print("**********Girish's Unit Converter!**********")
print("Greetings User! This program is made to facilitate you to convert a number from a unit to a another unit whether its length or weight!")
measure = input("Which measurement you would like to convert from and to (length or weight): ")
print(".......................................")
if measure == "length":
    num1 = int(input("Now. please enter the value from which you would like to convert. (eg. 100 m to km): "))
    unit1 = input("Pls enter the length unit from which you want to convert: ")
    if unit1 == "millimeter" or unit1 == "Millimeter" or unit1 == "mm" or unit1 == "MM":
        print("Valid unit!")
    elif unit1 == "centimeter" or unit1 == "Centimeter" or unit1 == "cm" or unit1 == "CM":
        print("Valid unit!")
    elif unit1 == "Metre" or unit1 == "Meter" or unit1 == "m" or unit1 == "M" or unit1 == "metre" or unit1 == "meter":
        print("Valid unit!")
    elif unit1 == "Kilometer" or unit1 == "kilometer" or unit1 == "km":
        print("Valid unit!")
    else:
        print("Please enter a valid unit!")
        exit(0)
    unit2 = input("Pls enter the another length unit to which you want to convert: ")
    if unit2 == "millimeter" or unit2 == "Millimeter" or unit2 == "mm" or unit2 == "MM":
        print("Valid unit!")
    elif unit2 == "centimeter" or unit2 == "Centimeter" or unit2 == "cm" or unit2 == "CM":
        print("Valid unit!")
    elif unit2 == "Metre" or unit2 == "Meter" or unit2 == "m" or unit2 == "M" or unit2 == "metre" or unit2 == "meter":
        print("Valid unit!")
    elif unit2 == "Kilometer" or unit2 == "kilometer" or unit2 == "km":
        print("Valid unit!")
    else:
        print("Please enter a valid unit!")
        exit(0)
    print(".....................................")
    if unit1 == "Kilometer" or unit1 == "kilometer" or unit1 == "km" and unit2 == "Metre" or unit2 == "Meter" or unit2 == "m" or unit2 == "M" or unit2 == "metre" or unit2 == "meter":
        result = num1*1000
        print(num1, 'km' + ' ' + '=', result, 'm')
    elif unit1 == "Metre" or unit1 == "Meter" or unit1 == "m" or unit1 == "M" or unit1 == "metre" or unit1 == "meter" and unit2 == "centimeter" or unit2 == "Centimeter" or unit2 == "cm" or unit2 == "CM":
        result1 = num1*100
        print(num1, 'm' + ' ' + '=', result1, 'cm')
    elif unit1 == "centimeter" or unit1 == "Centimeter" or unit1 == "cm" or unit1 == "CM" and unit2 == "millimeter" or unit2 == "Millimeter" or unit2 == "mm" or unit2 == "MM":
        result2 = num1*10
        print(num1, 'cm' + ' ' + '=', result2, 'mm')
    if unit1 == "millimeter" or unit1 == "Millimeter" or unit1 == "mm" or unit1 == "MM" and unit2 == "centimeter" or unit2 == "Centimeter" or unit2 == "cm" or unit2 == "CM":
        result3 = num1/10
        print(num1, 'mm' + ' ' + '=', result3, 'cm')
    elif unit1 == unit1 == "centimeter" or unit1 == "Centimeter" or unit1 == "cm" or unit1 == "CM" and unit2 == "Metre" or unit2 == "Meter" or unit2 == "m" or unit2 == "M" or unit2 == "metre" or unit2 == "meter":
        result4 = num1/100
        print(num1, 'cm' + ' ' + '=', result4, 'm')
    elif unit1 == "Metre" or unit1 == "Meter" or unit1 == "m" or unit1 == "M" or unit1 == "metre" or unit1 == "meter" and unit2 == "Kilometer" or unit2 == "kilometer" or unit2 == "km":
        result5 = num1/1000
        print(num1, 'm' + ' ' + '=', result5, 'km')
    else:
        print("The program isn't able to calculate your result")
elif measure == 'weight':
    num1 = int(input("Now. please enter the value from which you would like to convert. (eg. 1000 g to kg): "))
    unit1 = input("Pls enter the weight unit from which you want to convert: ")
    if unit1 == "milligram" or unit1 == "Milligram" or unit1 == "mg" or unit1 == "MG":
        print("Valid unit!")
    elif unit1 == "gram" or unit1 == "Gram" or unit1 == "g" or unit1 == "G":
        print("Valid unit!")
    elif unit1 == "kilogram" or unit1 == "Kilogram" or unit1 == "kg" or unit1 == "KG":
        print("Valid unit!")
    elif unit1 == "Ton" or unit1 == "Tonne" or unit1 == "t" or unit1 == 'T':
        print("Valid unit!")
    else:
        print("Please enter a valid unit!")
        exit(0)
    unit2 = input("Pls enter the weight unit to which you want to convert: ")
    if unit2 == "milligram" or unit2 == "Milligram" or unit2 == "mg" or unit2 == "MG":
        print("Valid unit!")
    elif unit2 == "gram" or unit2 == "Gram" or unit2 == "g" or unit2 == "G":
        print("Valid unit!")
    elif unit2 == "kilogram" or unit2 == "Kilogram" or unit2 == "kg" or  unit2 == "KG":
        print("Valid unit!")
    elif unit2 == "Ton" or unit2 == "Tonne" or unit2 == "t" or unit2 == 'T':
        print("Valid unit!")
    else:
        print("Please enter a valid unit!")
        exit(0)
    print(".....................................")
    if unit1 == "Ton" or unit1 == "Tonne" or unit1 == "t" or unit1 == 'T' and unit2 == "kilogram" or unit2 == "Kilogram" or unit2 == "kg" or unit2 == "KG":
        result = num1*1000
        print(num1, 't' + ' ' + '=', result, 'kg')
    elif unit1 == "kilogram" or unit1 == "Kilogram" or unit1 == "kg" or unit1 == "KG" and unit2 == "gram" or unit2 == "Gram" or unit2 == "g" or unit2 == "G":
        result1 = num1*1000
        print(num1, 'kg' + ' ' + '=', result1, 'g')
    elif unit1 == "gram" or unit1 == "Gram" or unit1 == "g" or unit1 == "G" and unit2 == "milligram" or unit2 == "Milligram" or unit2 == "mg" or unit2 == "MG":
        result2 = num1*1000
        print(num1, 'g' + ' ' + '=', result2, 'mg')
    if unit1 == "milligram" or unit1 == "Milligram" or unit1 == "mg" or unit1 == "MG" and unit2 == "gram" or unit2 == "Gram" or unit2 == "g" or unit2 == "G":
        result3 = num1/1000
        print(num1, 'mg' + ' ' + '=', result3, 'g')
    elif unit1 == "gram" or unit1 == "Gram" or unit1 == "g" or unit1 == "G" and unit2 == "kilogram" or unit2 == "Kilogram" or unit2 == "kg" or unit2 == "" or unit2 == "KG":
        result4 = num1/1000
        print(num1, 'g' + ' ' + '=', result4, 'kg')
    elif unit1 == "kilogram" or unit1 == "Kilogram" or unit1 == "kg" or unit1 == "KG" and unit2 == "Ton" or unit2 == "Tonne" or unit2 == "t" or unit2 == 'T':
        result5 = num1/1000
        print(num1, 'm' + ' ' + '=', result5, 'km')
    else:
        print("The program isn't able to calculate your result")
else:
    print("Pls enter a valid measurement")