#include<bits/stdc++.h>

using namespace std;

int k,a,b;

string s;

int main()

{

    cin>>k>>a>>b;

    cin>>s;

    if(s.size()<k*a || k*b<s.size()) cout<<"No solution"<<endl;

    else

    {

        int c=s.size()/k, p=;

        for(int r=;r<=k;r++)

        {

            if(r<k)

            {

                for(int i=;i<=c;i++) cout<<s[p++];

                cout<<endl;

            }

            else

            {

                while(p<s.size()) cout<<s[p++];

                cout<<endl;

            }

        }

    }

}