input: [0] Java keyword [1] abstract [2] N/A [3] super [4] boolean [5] break [6] N/A [8] catch [9] char [10] N/A [11] class [12] const1 [13] continue [14] N/A [15] default [16] N/A [17] do [18] double [19] else [20] N/A [21] N/A [22] N/A [7] 
output: case