C11111211113313112113313331333133313331333132322121111121111331333132213233221   >>    C1111121111331311211331333133313331333133313232212111112111133133313221323322   <<    C11111211113313112113313331333133313331333132322121111121111331333132213233223   >>      C11111211113313112113313331333133313331333132322121111121111331333132213233222   >>