ios - Comparing arrays, sets & their elements in SWIFT -

i'm new coding in , find answers on here. on occasion i've been trying find method in swift allow me identify pairs of numbers, in array of unpaired numbers within array example in image attached 1 can see index 7 & 8 in numbers array matches elements in numpr2...

import uikit

var numpr1 = [7,4]

var numpr2 = [3,1]

var numpr3 = [5,3]

var numpr4 = [1,7]

var numpr5 = [2,7]

var numpr6 = [4,5]

var numpr7 = [4,6]

var arrayofpairs = [numpr1,numpr2,numpr4,numpr7,numpr5,numpr6,numpr3]   var numbersarray = [1,5,7,6,2,4,6,3,1,7,4,5,3] 

do wanna this?

for(var = 0;i < numbersarray.count - 1;i++){     for(var index = 0;index < arrayofpairs.count;index++){         if(numbersarray[i] == arrayofpairs[index][0] &&             numbersarray[i+1] == arrayofpairs[index][1]){                 println(arrayofpairs[index])         }     } }