C1212121231123232233131323223313233313233313223313233313233231111   >>    C121212123112323223313132322331323331323331322331323331323323111   <<    C1212121231123232233131323223313233313233313223313233313233231113   >>      C1212121231123232233131323223313233313233313223313233313233231112   >>