C1111233131211111211113313331333133313232212111133132331211331313311211   >>    C111123313121111121111331333133313331323221211113313233121133131331121   <<    C1111233131211111211113313331333133313232212111133132331211331313311213   >>      C1111233131211111211113313331333133313232212111133132331211331313311212   >>