C11212213133313132313231322132313231311331313231333132322131323211   >>    C1121221313331313231323132213231323131133131323133313232213132321   <<    C11212213133313132313231322132313231311331313231333132322131323213   >>      C11212213133313132313231322132313231311331313231333132322131323212   >>