update backend

data/familynfriend/g1/F11.json

@@ -14,11 +14,6 @@
   {
     "grade": "010102",
     "vocab": [
-      "red",
-      "green",
-      "blue",
-      "black",
-      "yellow",
       "leaf",
       "apple",
       "sky",
@@ -37,9 +32,7 @@
       "car"
     ],
     "phonics": [
-      "C",
-      "c",
-      "/k/"
+      "c", "/k/"
     ],
     "grammar": []
   },
@@ -65,7 +58,6 @@
       "duck"
     ],
     "phonics": [
-      "D",
       "d",
       "/d/"
     ],
@@ -119,13 +111,9 @@
     ],
     "phonics": [
       "A",
-      "a",
       "B",
-      "b",
       "C",
-      "c",
-      "D",
-      "d"
+      "D"
     ],
     "grammar": [
       "What color is it?",