C1111233131211111211113313331333133313331333133313331333133313233221321   >>    C111123313121111121111331333133313331333133313331333133313331323322132   <<    C1111233131211111211113313331333133313331333133313331333133313233221323   >>      C1111233131211111211113313331333133313331333133313331333133313233221322   >>