exit value: 0 exit value: 0 exit value: 0 exit value: 1 exit value: 0 exit value: 0 exit value: 0 exit value: 0 exit value: 1 exit value: 0 exit value: 0 exit value: 0 exit value: 0 exit value: 0 exit value: 1 exit value: 1 exit value: 0 exit value: 0 exit value: 1