#include<iostream>
#include<stdio.h>
#include <string.h>
using namespace std;
int main()
{
char s[1000];
int count = 0;
int a;
while (gets(s))
{
a=strlen(s);
for(int i = 0; i < a; i++)
{
if(s[i] == '"'){
count++;
if(count%2==0)
printf("''");
else
printf("``");
}
else
printf("%c",s[i]);
}
printf("\n");
}
return 0;
}
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