C11111211113313112113313331311211331333133313331333133312111133133313223313221   >>    C1111121111331311211331333131121133133313331333133313331211113313331322331322   <<    C11111211113313112113313331311211331333133313331333133312111133133313223313223   >>      C11111211113313112113313331311211331333133313331333133312111133133313223313222   >>