若有以下程序 #include main() { char w[20], a[5][10]={"abcdef", "ghijkl", "mnopq", "rstuv", "wxyz"}; int p[6][2]={{0,1},{1,5},{0,0},{0,2},{1,4},{4,4}}, i; for (i=0; i<6; i++) w[i]=a[ p[i][0] ][ p[i][1] ]; puts(w); } 则程序的输出结果是