C1111233131211111211113313331333133313232212111133132331211331323211121   >>    C111123313121111121111331333133313331323221211113313233121133132321112   <<    C1111233131211111211113313331333133313232212111133132331211331323211123   >>      C1111233131211111211113313331333133313232212111133132331211331323211122   >>