C1212121231123232233131323223313233313233313223313231323132212312331   >>    C121212123112323223313132322331323331323331322331323132313221231233   <<    C1212121231123232233131323223313233313233313223313231323132212312333   >>      C1212121231123232233131323223313233313233313223313231323132212312332   >>