#include <iostream>
#include <vector>
using namespace std;

int main()
{
    cin.tie(nullptr);
    cout.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n,e;
    cin>>n>>e;
    vector<int>vec(n);
    for(int i = 0;i<n;i++)
    {
        cin>>vec[i];

    }
    int i = 0, j = 0, maxk = 1, maxv = 0, db  =0;

    for(int j =0;j<n;j++)
    {
        if(vec[j] >  30 || vec[j] < 10)
        {
            i = j + 1;
            db = 0;

            continue;
        }


        else if((vec[j] >= 10 && vec[j]<=14) || (vec[j]>=26 && vec[j]<=30))
        {
            db++;
            if(db>e)
            {
                while(!((vec[i] >= 10 && vec[i]<=14) || (vec[i]>=26 && vec[i]<=30))) {i++;}
                i++;
                db--;
            }
        }

        if((vec[j] <=  30 || vec[j] >= 10) && j-i>maxv-maxk)
        {
            maxk = i;
            maxv = j;
        }
    }

    if(maxk == 1 && maxv == 0) cout <<-1<<"\n";
    else cout<<maxk + 1<<" "<<maxv + 1<<"\n";
    return 0;
}
/*
11 2
28 25 34 30 21 20 29 10 18 15 9

15 10
30 25 14 13 14 20 20 16 24 28 22 30 28 11 14
*/