s = input()
while s:

    s = s[0] + s[1:].lower()
    for i in range(len(s) - 1):
        if s[i] == "." or s[i] == "!" or s[i] == "?":
            s = s[:i + 1] + s[i + 1].upper() + s[i + 2:]
    print(s)
    s = input()