Function: invert(numbers("xxy") if numbers('rep') > minus(numbers("xxy"), numbers('epe')) else numbers('epe') if minus(numbers("xxy"), numbers('epe')) > numbers("xxy") else numbers('rep') if minus(numbers("xxy"), numbers('epe')) > numbers('epe') else numbers("xxy") if minus(numbers("xxy"), numbers('epe')) > numbers('epe') else numbers("xxy"))
