题解 | #统计字符#

while True:
    try:
        s = input()
        n_alph = 0
        n_spac = 0
        n_digt = 0
        n_othe = 0
        for i in range(len(s)):
            if s[i].isalpha():
                n_alph += 1
            elif s[i] == ' ':
                n_spac += 1
            elif s[i].isdigit():
                n_digt += 1
            else:
                n_othe += 1
        print(n_alph)
        print(n_spac)
        print(n_digt)
        print(n_othe)
    except:
        break