[백준 2941] 크로아티아 알파벳 - Python

croatia = str(input())
croatiaList = ['c=','c-','dz=','d-','lj','nj','s=','z=']
i=0
cnt = 0
while i<len(croatia):
    if croatia[i:i+2] in croatiaList:
        i+=2
    elif croatia[i:i+3] in croatiaList:
        i+=3
    else:
        i+=1
    cnt += 1
print(cnt)