C31232233133313221211113313331333133313132322331323133311212131   >>    C3123223313331322121111331333133313331313232233132313331121213   <<    C31232233133313221211113313331333133313132322331323133311212133   >>      C31232233133313221211113313331333133313132322331323133311212132   >>