a[26],p,t;main(q){for(;~scanf("%d",a-3+t++););for(q=a[8];q--;)p=p<(t=q*(q-1)/2*(a[8]-q))?t:p;p=!printf("%ld",1L*a[11]*a[11]/4*a[4]*a[1]*a[19]*a[14]**a*p);}