C1111233131211111211113313231333133313331323221211113313311232321131   >>    C111123313121111121111331323133313331333132322121111331331123232113   <<    C1111233131211111211113313231333133313331323221211113313311232321133   >>      C1111233131211111211113313231333133313331323221211113313311232321132   >>