C222133313331333131123313231333133313331313113313331333132331133132223133322121   >>    C22213331333133313112331323133313331333131311331333133313233113313222313332212   <<    C222133313331333131123313231333133313331313113313331333132331133132223133322123   >>      C222133313331333131123313231333133313331313113313331333132331133132223133322122   >>