C11212213133313132313231322132313231311331313231333132322313231   >>    C1121221313331313231323132213231323131133131323133313232231323   <<    C11212213133313132313231322132313231311331313231333132322313233   >>      C11212213133313132313231322132313231311331313231333132322313232   >>