input nmin,nmax: 
n, Gray[n], Gray(Gray[n]), Gray[n] ^ Gray[n+1]
0 0 0 1
343 508 343 8
686 1017 686 1
1029 1543 1029 2
1372 2034 1372 1
1715 1514 1715 4
2058 3087 2058 1
2401 3537 2401 2
2744 4068 2744 1
3087 2568 3087 16
3430 3029 3430 1
3773 2531 3773 2
input nmin,nmax: 
n, Gray[n], Gray(Gray[n]), Gray[n] ^ Gray[n+1]
2147483645 1073741827 2147483645 2
2147483646 1073741825 2147483646 1
input nmin,nmax: 
Normal completion