默默无闻

s = input()
letters = digits = others = 0

for char in s:
if char.isalpha():
letters += 1
elif char.isdigit():
digits += 1
else:
others += 1

print(f"英文字母数量: {letters}")
print(f"数字数量: {digits}")
print(f"其他字符数量: {others}")