程序代码：

# include <stdio.h>
# include <string.h>

int main()
{
    char str[100];
    int i,j,k,m;

    scanf ("%d", &m);

    while (m > 0)
    {
        scanf ("%s", str);

        for (i=0; i<100; i++)
        {
            if (str[i] == '/')
                break;
        }

        for (j=i+2; j<100; j++)
        {
            if (str[j] == ':' || str[j] == '/')
                break;
        }

        for (k=i+2; k<j; k++)
            printf ("%c", str[k]);

        printf ("\n");
        m--;
   
    }

    return 0;
}