python 求助 输入这里有点懵

import numpy as np
f=list(input())
while True:
    if 'E' not in f:
        pass
        for i in list(input()):
            f.append(i)
    else:
        break

for i in range(len(f)):
    if f[i]=='E':
        del f[i:]

j=0
wn=0
ln=0
while (j<len(f)):
    if f[j]=='W':
            wn+=1
    else:
            ln+=1
    if (j+1)%11==0 or j==len(f)-1:
        print("{}:{}".format(wn,ln))
        wn=0
        ln=0
    j+=1

print()

j=0
while (j<len(f)):
    if f[j]=='W':
            wn+=1
    else:
            ln+=1
    if (j+1)%21==0 or j==len(f)-1:
        print("{}:{}".format(wn,ln))
        wn=0
        ln=0
    j+=1