C313331311233133313112331333132313331323132322331323133313231221   >>    C31333131123313331311233133313231333132313232233132313331323122   <<    C313331311233133313112331333132313331323132322331323133313231223   >>      C313331311233133313112331333132313331323132322331323133313231222   >>