from __future__ import print_function

# Created by sarathkaul on 12/11/19


def convert_time(input_str):
    # Checking if last two elements of time
    # is AM and first two elements are 12
    if input_str[-2:] == "AM" and input_str[:2] == "12":
        return "00" + input_str[2:-2]

    # remove the AM
    elif input_str[-2:] == "AM":
        return input_str[:-2]

    # Checking if last two elements of time
    # is PM and first two elements are 12
    elif input_str[-2:] == "PM" and input_str[:2] == "12":
        return input_str[:-2]

    else:
        # add 12 to hours and remove PM
        return str(int(input_str[:2]) + 12) + input_str[2:8]


if __name__ == "__main__":
    input_time = input("Enter time you want to convert: ")
    print(convert_time(input_time))