Croatia = ['c=','c-','dz=','d-','lj','nj','s=','z=']
word = input()
spans = []
pos = 0
while pos<len(word):
matched = False
for C in Croatia:
if word[pos:pos+len(C)] == C:
spans.append(C)
pos+=len(C)
matched = True
break
if not matched:
spans.append(word[pos])
pos+=1
print(len(spans))
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