C3133313112331333131123313331323133313231323223313331323123231311   >>    C313331311233133313112331333132313331323132322331333132312323131   <<    C3133313112331333131123313331323133313231323223313331323123231313   >>      C3133313112331333131123313331323133313231323223313331323123231312   >>