C1212121231123232233131323223313231333131123313112211232313231232321   >>    C121212123112323223313132322331323133313112331311221123231323123232   <<    C1212121231123232233131323223313231333131123313112211232313231232323   >>      C1212121231123232233131323223313231333131123313112211232313231232322   >>