C11111211113313112113313331333133313331312111133112331323211232321   >>    C1111121111331311211331333133313331333131211113311233132321123232   <<    C11111211113313112113313331333133313331312111133112331323211232323   >>      C11111211113313112113313331333133313331312111133112331323211232322   >>