#include<stdio.h>
#include<string.h>
int main(int argc,char *argv[])
{
int index,index2,pos;
if(argv[1]==NULL) return NULL;
int str_len
= strlen(argv
[1]);
for(index=0;index < (1<<str_len);++index)
{
index2=index;pos=0;
while(index2)
{
if( index2 & 0x01)
index2=index2>>1;++pos;
}
}
}
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