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probe begin
{
s = "Hello World!"
printf("%s\n", s)
x = substr(s,0,0)
printf("0,0: %s\n", x)
x = substr(s,-1,10)
printf("-1,10: %s\n", x)
x = substr(s,10,0)
printf("10,0: %s\n", x)
x = substr(s,0,1)
printf("0,1: %s\n", x)
x = substr(s,1,1)
printf("1,1: %s\n", x)
x = substr(s,2,1)
printf("2,1: %s\n", x)
x = substr(s,2,5)
printf("2,5: %s\n", x)
x = substr(s,6,1)
printf("6,1: %s\n", x)
x = substr(s,11,1)
printf("11,1: %s\n", x)
x = substr(s,11,100)
printf("11,100: %s\n", x)
x = substr(s,12,1)
printf("12,1: %s\n", x)
x = substr(s,0,10)
printf("0,10: %s\n", x)
x = substr(s,0,100)
printf("0,100: %s\n", x)
x = substr(s,0,100000)
printf("0,100000: %s\n", x)
exit()
}
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