272

#include <stdio.h>
#include <string.h>
int main()
{
    int i, count = 0,length;
    char s[100];
    while (gets(s))
    {
       length = strlen(s);
        for (i = 0; i <length; i++)
        {
            if (s[i] == '"')
            {
                count+= 1;
                if (count % 2 == 1)
                    printf("``");
                else
                    printf("''");
            }
            else
                printf("%c", s[i]);
        }
        printf("\n");
    }
    return 0;
}