#include<stdio.h>
#include<string.h>
main()
{ int c
,b
,z
=0;
char a
[200];
gets(a
);
c
=strlen(a
);
int d
[200]={0};
for(b
=0;b
<c
;b
++)
{ if(a
[b
]==32)
if(z
==0)
z
=1;
else
d
[b
]=1;
else
z
=0;
}
for(b
=0;b
<c
;b
++)
if(d
[b
]==0)
printf("%c",a
[b
]);
}
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