C11111211113313112113313331333133313331333132313231333133312132321   >>    C1111121111331311211331333133313331333133313231323133313331213232   <<    C11111211113313112113313331333133313331333132313231333133312132323   >>      C11111211113313112113313331333133313331333132313231333133312132322   >>