C21221212121323223313131323132322331323331323121133132312323111   >>    C2122121212132322331313132313232233132333132312113313231232311   <<    C21221212121323223313131323132322331323331323121133132312323113   >>      C21221212121323223313131323132322331323331323121133132312323112   >>