C21221212121323223313131323132322331323331323121133132313232212321   >>    C2122121212132322331313132313232233132333132312113313231323221232   <<    C21221212121323223313131323132322331323331323121133132313232212323   >>      C21221212121323223313131323132322331323331323121133132313232212322   >>