The first line of the input is a string (between 1 and 50 characters long, inclusive). Each character will be a letter of English alphabet, lowercase or uppercase.

The second line of the input is an integer between 0 and 26, inclusive.
word = input().lower()
lim = int(input())

for letter in word:
    if ord(letter)<lim+97:
        print(letter.upper(),end='')
    else:
        print(letter,end='')