C1212121231123232233131323223313233313233313223313132333132311211311   >>    C121212123112323223313132322331323331323331322331313233313231121131   <<    C1212121231123232233131323223313233313233313223313132333132311211313   >>      C1212121231123232233131323223313233313233313223313132333132311211312   >>