C11111211113313112113313331333133313331333132313331333133313331323111123231211   >>    C1111121111331311211331333133313331333133313231333133313331333132311112323121   <<    C11111211113313112113313331333133313331333132313331333133313331323111123231213   >>      C11111211113313112113313331333133313331333132313331333133313331323111123231212   >>