Function: invert(numbers("per") if invert(numbers("xxx") if numbers("per") > numbers("per") else numbers('xry')) > numbers("per") if numbers('xry') > numbers("xxx") else numbers("per") else numbers("xxx") if invert(numbers("per") if numbers("xxx") > numbers("per") else numbers('xry')) > numbers("per") if numbers("xxx") > numbers("per") else numbers('xry') else numbers("per"))