C1212121231123232233131323223313233313233313223313132333132313311211211   >>    C121212123112323223313132322331323331323331322331313233313231331121121   <<    C1212121231123232233131323223313233313233313223313132333132313311211213   >>      C1212121231123232233131323223313233313233313223313132333132313311211212   >>