C1212121231123232233131323223313233313233313223313233313133112323131   >>    C121212123112323223313132322331323331323331322331323331313311232313   <<    C1212121231123232233131323223313233313233313223313233313133112323133   >>      C1212121231123232233131323223313233313233313223313233313133112323132   >>