Help with Array

Hi, I have not gone into arrays in any great detail but I have a slight problem. I have two groups of people into memory variables, but the person's name and a corresponding number. I need to "merge" these groups into an array, sort the data by the number, then output into a different memory variable (name only). For instance, I have $personA1 and $personAnumber1 ... $personA7 and $personAnumber7. PersonB only goes up to six, giving me a total of 13 people combined. I want to enter both of these details into an array, sort it by the second value (number), then output the first value only (name) to a new variable $person1, $person2, etc. I presume this would be simple but I get confused with arrays. Could someone please help? Thanks, Michael