line = input('Enter a string: ')
uppercase_count, lowercase_count, digit_count = 0, 0, 0
for c in line:
    if c.isupper(): uppercase_count += 1
    elif c.islower(): lowercase_count += 1
    elif c.isdigit(): digit_count += 1

print('Number of')
print('  Uppercase characters:', uppercase_count)
print('  Lowercase characters:', lowercase_count)
print('  Digits:', digit_count)