C12312213132313231311331313331322132313231232313231333132211231   >>    C1231221313231323131133131333132213231323123231323133313221123   <<    C12312213132313231311331313331322132313231232313231333132211233   >>      C12312213132313231311331313331322132313231232313231333132211232   >>