C11111211113313112113313331333132313331322113121111133313233221   >>    C1111121111331311211331333133313231333132211312111113331323322   <<    C11111211113313112113313331333132313331322113121111133313233223   >>      C11111211113313112113313331333132313331322113121111133313233222   >>