C2123132222131133131121131211113313231322331333132212111113232213221   >>    C212313222213113313112113121111331323132233133313221211111323221322   <<    C2123132222131133131121131211113313231322331333132212111113232213223   >>      C2123132222131133131121131211113313231322331333132212111113232213222   >>