C11111211113313112113313331333133313331333132313331333133313232121321   >>    C1111121111331311211331333133313331333133313231333133313331323212132   <<    C11111211113313112113313331333133313331333132313331333133313232121323   >>      C11111211113313112113313331333133313331333132313331333133313232121322   >>