C1212121231123232233131323223313233313233313223313132333132313331313211   >>    C121212123112323223313132322331323331323331322331313233313231333131321   <<    C1212121231123232233131323223313233313233313223313132333132313331313213   >>      C1212121231123232233131323223313233313233313223313132333132313331313212   >>