func syncWork(){
        let northZone = DispatchQueue(label: "perform_task_with_team_north")
        let southZone = DispatchQueue(label: "perform_task_with_team_south")
        
        northZone.sync {
            for numer in 1...3{ print("North \(numer)")}
        }
        southZone.sync {
            for numer in 1...3{ print("South \(numer)") }
        }
    }
    
    //Call Func here 
    syncWork()
    
//Output
//    North 1
//    North 2
//    North 3
//    South 1
//    South 2
//    South 3