... SUBSTRING(STUFF(STUFF(STUFF('1234567', a, 1, ''), b, 1, ''), c, 1, ''), d, 1) || SUBSTRING(STUFF(STUFF(STUFF(STUFF('1234567', a, 1, ''), b, 1, ''), ... 1, ''), d, 1, ''), e, 1) || SUBSTRING(STUFF(STUFF(STUFF(STUFF(STUFF('1234567', a, 1, ''), b, 1, ''), c, 1, ''), d, 1, ''), ... 1, ''), f, 1) || STUFF(STUFF(STUFF(STUFF(STUFF(STUFF('1234567', a, 1, ''), b, 1, ''), c, 1, ''), d, 1, ''), e, 1, ''),...