Capitalization is writing a word with its first letter as a capital letter. Your task is to capitalize the given word.

Note, that during capitalization all the letters except the first one remains unchanged.
A single line contains a non-empty word. This word consists of lowercase and uppercase English letters. The length of the word will not exceed 10<sup class="upper-index">3</sup>.
userinput = input()
ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alphabet = "abcdefghijklmnopqrstuvwxyz"
i = 0

# Check if the first letter is 'z'
if userinput[0] == 'z':
    userinput = 'Z' + userinput[1:]
else:
    # Iterate through lowercase alphabet
    while i < len(alphabet):
        # Check if the first letter matches the current lowercase letter
        if userinput[0] == alphabet[i]:
            # Replace the first letter with the corresponding uppercase letter
            userinput = ALPHABET[i] + userinput[1:]
            break
        else:
            i += 1

print(userinput)
