This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
def HONI(n):
x,Honi=0,[]
for c in n:
if c not in Honi and c in ["H","O","N","I"]:
Honi.append(c)
if len(Honi)==4:
x+=1
Honi.clear()
return x
inp=input()
print(HONI(inp))
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