C11212213133313132313231322132313231333132313112331323331323221323121   >>    C1121221313331313231323132213231323133313231311233132333132322132312   <<    C11212213133313132313231322132313231333132313112331323331323221323123   >>      C11212213133313132313231322132313231333132313112331323331323221323122   >>