C112122131333131323132313221323132313113313132313331323221313232211   >>    C11212213133313132313231322132313231311331313231333132322131323221   <<    C112122131333131323132313221323132313113313132313331323221313232213   >>      C112122131333131323132313221323132313113313132313331323221313232212   >>