C112233313331323223313331311331323133313331313231333131133112321   >>    C11223331333132322331333131133132313331333131323133313113311232   <<    C112233313331323223313331311331323133313331313231333131133112323   >>      C112233313331323223313331311331323133313331313231333131133112322   >>