C1111233131211111211113313331333133313331312211113313331311331322132233323321   >>    C111123313121111121111331333133313331333131221111331333131133132213223332332   <<    C1111233131211111211113313331333133313331312211113313331311331322132233323323   >>      C1111233131211111211113313331333133313331312211113313331311331322132233323322   >>