C132233133112121111331333133313231333133313231212111133132211211   >>    C13223313311212111133133313331323133313331323121211113313221121   <<    C132233133112121111331333133313231333133313231212111133132211213   >>      C132233133112121111331333133313231333133313231212111133132211212   >>