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.
s = input()
n = int(input())
alp = "abcdefghijklmnopqrstuvwxyz"
x = alp[:n]
ans = ""
for i in s:
    if i in x:
        ans += i.upper()
    else:
        ans+=i
print(ans)

