1BEGIN { 2 range = "[a-dx-z]" 3 4 split("ABCDEFGHIJKLMNOPQRSTUVWXYZ", upper, "") 5 split("abcdefghijklmnopqrstuvwxyz", lower, "") 6 7 for (i = 1; i in upper; i++) 8 printf("%s ~ %s ---> %s\n", 9 upper[i], range, (upper[i] ~ range) ? "true" : "false") 10 11 for (i = 1; i in lower; i++) 12 printf("%s ~ %s ---> %s\n", 13 lower[i], range, (lower[i] ~ range) ? "true" : "false") 14} 15