#include <stdio.h>

int main(void)
{
    long a,b,c,d,i,j,f=0;
    scanf("%ld%ld",&a,&b);
    c=a;
    do{
        if(c%10!=0)f++;
        c/=10;
    }while(c>9);
    d=b;
    do{
        if(d%10!=0)f++;
        d/=10;
    }while(d>9);
    if(f>0){
        if(a*b>=-99999999&&99999999>=a*b)printf("%ld",a*b);
        else puts("E");
    }
    else printf("%ld",a*b/10);
    return 0;
}