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  1. a=input()
  2. t=0
  3. for i in range(len(a)):
  4. if a[i]=='i' or a[i]=='I':
  5. if a[i+1]=='I':
  6. t=i+1
  7. break
  8. else:
  9. t=-1
  10. else:
  11. t=-1
  12. if t<=0:
  13. print('-1')
  14. else:
  15. print(t+1)
Success #stdin #stdout 0.02s 9028KB
stdin
IIIIIIIiI
stdout
2