halo2: add comment with indices table for permutation cycles

scripts/halo/halo2.sage

@@ -152,11 +152,16 @@ for i, (A_1_i, A_2_i, A_3_i, A_4_i, F_1_i, F_2_i, F_3_i, F_4_i, I_i) in \
 
 # beta, gamma
 
-# A1:   1,  0,  s,   s,            s,          0,   z,  -
-# A2:   -,  -,  s,   x,            x,        sxy,   -,  -
-# A3:   -,  -,  0,   y,            y, (1-s)(x+y),   -,  -
-# A4:   -,  -,  0, sxy, (1-s)(x + y),          z,   -,  -
-# A5:   -,  -,  -,   -,            -,          -,   z,  -
+#       0   1   2    3             4           5    6       ...     15
+# A1:   1,  0,  s,   s,            s,          0,   z
+#      16  17  18   19            20          21   22       ...     31
+# A2:   -,  -,  s,   x,            x,        sxy,   -
+#      32  33  34   35            36          37   38       ...     47
+# A3:   -,  -,  0,   y,            y, (1-s)(x+y),   -
+#      48  49  50   51            52          53   54       ...     63
+# A4:   -,  -,  0, sxy, (1-s)(x + y),          z,   -
+#      64  65  66   67            68          69   70       ...     79
+# A5:   -,  -,  -,   -,            -,          -,   z
 permuted_indices_A1 = []
 
 y = K.random_element()