C11111211113313112113313331333133313331333132313231333133313331323211232322321   >>    C1111121111331311211331333133313331333133313231323133313331333132321123232232   <<    C11111211113313112113313331333133313331333132313231333133313331323211232322323   >>      C11111211113313112113313331333133313331333132313231333133313331323211232322322   >>