#include<iostream>
#include<algorithm>
#define M 20050
using namespace std;
int main()
{
int m,n,i,j,k,head[M],height[M],mincost,st;
//freopen("in.txt","r",stdin);
while(scanf("%d%d",&m,&n)&&(m|n))
{
for(i=0;i<m;i++)
scanf("%d",&head[i]);
for(i=0;i<n;i++)
scanf("%d",&height[i]);
if(m>n)
{
printf("Loowater is doomed!\n");
continue;
}
sort(head,head+m);
sort(height,height+n);
mincost=st=0;
while(head[0]>height[st])st++;
if(m>n-st)
{
printf("Loowater is doomed!\n");
continue;
}
j=0;
for(i=st;i<n&&j<m;i++)
{
if(height[i]>=head[j])
mincost=mincost+height[i],j=j+1;
}
if(j==m)
printf("%d\n",mincost);
else
printf("Loowater is doomed!\n");
}
return 0;
}
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