{
  "input" : [
    { "item" : "copperplate", "count" : 4 },
    { "item" : "ironplate", "count" : 4 }
  ],
  "output" : {
    "item" : "rustlegs2",
    "count" : 1
  },
  "groups" : [ "prototyper", "armors", "all" ]
}