C21111113313132322331323331323113313233313331323131133132233231   >>    C2111111331313232233132333132311331323331333132313113313223323   <<    C21111113313132322331323331323113313233313331323131133132233233   >>      C21111113313132322331323331323113313233313331323131133132233232   >>