C21111113313132322331323331323113313231323121133132322331123231   >>    C2111111331313232233132333132311331323132312113313232233112323   <<    C21111113313132322331323331323113313231323121133132322331123233   >>      C21111113313132322331323331323113313231323121133132322331123232   >>