#include <stdio.h>

int main(int argc, char *argv[])
{                    
        int str[10] = {2,3,3,5,6,7,4,5,6};
        int i;
        int t = 0;
        for(i = 0; i < 10; i++)
        {
                if((str[i+1] - str[i] == 1))
                {
                        printf("%d", str[i]);
                        t++;
                }
                if(((i+1)%3 == 0) && (t == 2))
                {
                        printf("%d", str[i]);
                        t = 0;
                }
        }
        return 0;
}