#include <stdio.h>
#include <stdlib.h>

int main()
{
    float a,b,c;
    scanf("%f%f%f",&a,&b,&c);
    if (a+b>c&&a+c>b&&b+c>a)
        printf("%.2f,%.3f and %.4f can from a valid triangle!",a,b,c);
    else
        printf("%.2f,%.3f and %.4f cannot from a valid triangle!",a,b,c);
    return 0;
}