C1231221313231323131133131333132213231323123231323133313222323221   >>    C123122131323132313113313133313221323132312323132313331322232322   <<    C1231221313231323131133131333132213231323123231323133313222323223   >>      C1231221313231323131133131333132213231323123231323133313222323222   >>