#include<cstdio>

using namespace std;

int n,k,i,mn,mx,crt,st,dr,a[100002],s[100002];

int main()
{
    freopen("secv2.in","r",stdin);
    freopen("secv2.out","w",stdout);
    scanf("%d%d",&n,&k);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&a[i]);
        s[i]=s[i-1]+a[i];
    }
    mn=10000000;
    mx=10000000;
    for(i=k;i<=n;i++)
    {
        if(mn>s[i-k])
        {
            crt=i-k+1;
            mn=s[i-k];
        }
        if(mx<s[i]-mn)
        {
            mx=s[i]-mn;
            st=crt;
            dr=i;
        }
    }
    printf("%d %d\n",st,dr);
}