C1212121231123232233131323223313233313233313223313231133132322331311311   >>    C121212123112323223313132322331323331323331322331323113313232233131131   <<    C1212121231123232233131323223313233313233313223313231133132322331311313   >>      C1212121231123232233131323223313233313233313223313231133132322331311312   >>