C1111233131211111211113313231333133313331323221211111323132231211   >>    C111123313121111121111331323133313331333132322121111132313223121   <<    C1111233131211111211113313231333133313331323221211111323132231213   >>      C1111233131211111211113313231333133313331323221211111323132231212   >>