python题解，暴力

会的函数不多，采用下下方案。

Letters = 0
Digits = 0
Others = 0
s = ["q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","n","m"]
n = ["1","2","3","4","5","6","7","8","9","0"]
a = input()[:-1]
for i in a:
    if i in s:
        Letters += 1
    elif i in n:
        Digits += 1
    else:
        Others += 1
print("Letters" + "=" + str(Letters)) 
print("Digits" + "=" + str(Digits))
print("Others" + "=" + str(Others))