C11111211113313112113313331333133313331333131211113313331323221323123232321   >>    C1111121111331311211331333133313331333133313121111331333132322132312323232   <<    C11111211113313112113313331333133313331333131211113313331323221323123232323   >>      C11111211113313112113313331333133313331333131211113313331323221323123232322   >>