Поскольку вы не указали свою формулу, это должно быть полезно:
=IF(ISNUMBER(MATCH(C6,{"A","B","C"},0)),"Slip...",IF(ISNUMBER(MATCH(C6,{"D","E","F"},0)),"Personal...","Not"))
Для вашего комментария ваша формула должна быть:
=IF(ISNUMBER(MATCH(C6,{"Slip Trip Fall","Fall down Stairs","Knock, Trip or Fall within bus"},0)),"Slip Trip Fall", IF(ISNUMBER(MATCH(C6,{"Alighting incident","Boarding incident","Struck by object","Personal Injury Event","Wheelchair / Buggy incident"},0)),"Personal Injury Event",IF(ISNUMBER(MATCH(C6,{"Collision","Collision incident"},0)),"Personal Injury Event",FALSE)))