Maps an item id (in A) to its name's string index: ids 0-2 -> 35 Elctrc Prd, 3-5 -> 36 Incineratr, 6-7 -> 37 Tracker, 8-11 -> 38 Fire Extng, 12 -> 39 Harpn Gun, 13-15 -> 40 Laser Pist, 16 -> 41 Net, 17 -> 42 Cat Box, 18-19 -> 43 Spanner; ids 20/21 (Jones captured) -> strings 68 "Cat in Net" / 69 "Cat in Box".