C11212213133313132313231322132313231333132313112331323331323132231231   >>    C1121221313331313231323132213231323133313231311233132333132313223123   <<    C11212213133313132313231322132313231333132313112331323331323132231233   >>      C11212213133313132313231322132313231333132313112331323331323132231232   >>