#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
int main()
{
ll n,p,q;
cin>>n>>p>>q;
string s;
cin>>s;
ll l,r;
bool flag = false;
for(ll i=0;i<=n;i++)
{
for(ll j=0;j<=n;j++)
{
if((i*p)+(j*q)==n)
{
l = i;
r = j;
flag = true;
}
}
}
if(flag)
{
cout<<l+r<<endl;
ll c=0;
for(ll i = 0;i<l;i++)
{
cout<<s.substr(c,p)<<endl;
c = c+p;
}
for(ll i=0;i<r;i++)
{
cout<<s.substr(c,q)<<endl;
c=c+q;
}
}
else
{
cout<<"-1"<<endl;
}
}
1661B - Getting Zero | 1661A - Array Balancing |
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1455A - Strange Functions | 1566B - MIN-MEX Cut |
678C - Joty and Chocolate | 1352E - Special Elements |
1520E - Arranging The Sheep | 1157E - Minimum Array |
1661D - Progressions Covering | 262A - Roma and Lucky Numbers |
1634B - Fortune Telling | 1358A - Park Lighting |
253C - Text Editor | 365B - The Fibonacci Segment |
75A - Life Without Zeros | 1519A - Red and Blue Beans |
466A - Cheap Travel | 659E - New Reform |
1385B - Restore the Permutation by Merger | 706A - Beru-taxi |
686A - Free Ice Cream | 1358D - The Best Vacation |
1620B - Triangles on a Rectangle | 999C - Alphabetic Removals |
1634C - OKEA | 1368C - Even Picture |
1505F - Math | 1473A - Replacing Elements |