C2123132222131133131121131211113313231322331333133311211331323221213221   >>    C212313222213113313112113121111331323132233133313331121133132322121322   <<    C2123132222131133131121131211113313231322331333133311211331323221213223   >>      C2123132222131133131121131211113313231322331333133311211331323221213222   >>