#include <stdio.h>
#include <stdlib.h>
int req(int br)
{
    if(br==0) return 0;

   int r=req(br/10);

    int c=br%10;
    if(c%2==0)
    {
        printf("%d",2*c);
        return r+1;
    }
        return r;
}

int main()
{
    int n;
    scanf("%d",&n);
    int br;
    while(n>0)
    {
        scanf("%d",&br);
        printf(" : %d",req(br));
        n--;
    }
    return 0;
}