{
    "hints":  [
                  {
                      "text":  "Fold the shape along the line shown in the diagram.",
                      "level":  1
                  },
                  {
                      "text":  "Compare the two halves. Do they match each other?",
                      "level":  2
                  },
                  {
                      "text":  "Both halves are identical, so they fit exactly.",
                      "level":  3
                  }
              ]
}