C31232233133313221211113313331333132313232233133313331313112112121   >>    C3123223313331322121111331333133313231323223313331333131311211212   <<    C31232233133313221211113313331333132313232233133313331313112112123   >>      C31232233133313221211113313331333132313232233133313331313112112122   >>