s = input('请输入一个字符串:')
letters = 0
space = 0
digit = 0
others = 0

for c in s:
    if c.isalpha():
        letters += 1
    elif c.isspace():
        space += 1
    elif c.isdigit():
        digit += 1
    else:
        others += 1

print(f'char = {letters},space = {space},digit = {digit},others = {others}')