input: [0] C# keyword [1] extern [2] false [3] finally [4] fixed [5] float [6] for [8] get [9] goto [10] if [11] implicit [12] in [13] int [14] interface [15] internal [16] is [17] lock [18] long [19] namespace [20] new [21] null [22] object [7] 
output: foreach