static object Solve()
{
var n = int.Parse(Console.ReadLine());
var s = Console.ReadLine();
var t = Console.ReadLine();
var tr = string.Join("", t.Select(c => c == 'G' ? 'B' : c == 'B' ? 'G' : c));
var tg = string.Join("", t.Select(c => c == 'B' ? 'R' : c == 'R' ? 'B' : c));
var tb = string.Join("", t.Select(c => c == 'R' ? 'G' : c == 'G' ? 'R' : c));
var sr = new RH(s);
var trr = new RH(tr);
var trg = new RH(tg);
var trb = new RH(tb);
var c = 0;
for (var(i, j) = (-(n - 1), n - 1); i < n; i++, j--)
{
var sh = sr.Hash2(Math.Max(0, i), Math.Min(n, i + n));
var(l, r) = (Math.Max(0, j), Math.Min(n, j + n));
if (sh == trr.Hash2(l, r) || sh == trg.Hash2(l, r) || sh == trb.Hash2(l, r))
{
c++;
}
}
return(c);
}
