using System;
using System.IO;
using System.Linq;
using System.Text;

namespace Contest
{
    class Program
    {
        private Scanner sc;
        private int N;
        private string S;
        private bool[] Sheep;
        public void Solve()
        {
            sc = new Scanner();

            N = sc.NextInt();
            S = sc.Next();

            if (Check(true, true))
            {
                Console.WriteLine(string.Join("", Sheep.Select(b => b ? 'S' : 'W').ToArray()));
                return;
            }
            if (Check(true, false))
            {
                Console.WriteLine(string.Join("", Sheep.Select(b => b ? 'S' : 'W').ToArray()));
                return;
            }
            if (Check(false, true))
            {
                Console.WriteLine(string.Join("", Sheep.Select(b => b ? 'S' : 'W').ToArray()));
                return;
            }
            if (Check(false, false))
            {
                Console.WriteLine(string.Join("", Sheep.Select(b => b ? 'S' : 'W').ToArray()));
                return;
            }
            Console.WriteLine(-1);
        }

        private bool Check(bool zero, bool one)
        {
            Sheep = new bool[N];
            Sheep[0] = zero;
            Sheep[1] = one;
            for (int i = 1; i <= N; i++)
            {
                int p = i;
                int b = i - 1;
                int n = i + 1;
                if (i == N - 1)
                {
                    n = 0;
                }
                else if (i == N)
                {
                    p = 0;
                    n = 1;
                }
                else
                {
                    // 羊 羊o 羊
                    // 羊 羊x 狼
                    // 羊 狼o 狼
                    // 羊 狼x 羊
                    // 狼 羊o 狼


                }
                Sheep[n] = Sheep[p] ^ (S[p] == 'o') ^ Sheep[b];
            }

            return Sheep[0] == zero && Sheep[1] == one;
        }

        static void Main() => new Program().Solve();
    }
}

class Scanner
{
    public Scanner()
    {
        _stream = new StreamReader(Console.OpenStandardInput());
        _pos = 0;
        _line = new string[0];
        _separator = ' ';
    }
    private readonly char _separator;
    private readonly StreamReader _stream;
    private int _pos;
    private string[] _line;
    #region get a element
    public string Next()
    {
        if (_pos >= _line.Length)
        {
            _line = _stream.ReadLine().Split(_separator);
            _pos = 0;
        }
        return _line[_pos++];
    }
    public int NextInt()
    {
        return int.Parse(Next());
    }
    public long NextLong()
    {
        return long.Parse(Next());
    }
    public double NextDouble()
    {
        return double.Parse(Next());
    }
    #endregion
    #region convert array
    private int[] ToIntArray(string[] array)
    {
        var result = new int[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = int.Parse(array[i]);
        }

        return result;
    }
    private long[] ToLongArray(string[] array)
    {
        var result = new long[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = long.Parse(array[i]);
        }

        return result;
    }
    private double[] ToDoubleArray(string[] array)
    {
        var result = new double[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = double.Parse(array[i]);
        }

        return result;
    }
    #endregion
    #region get array
    public string[] Array()
    {
        if (_pos >= _line.Length)
            _line = _stream.ReadLine().Split(_separator);
        _pos = _line.Length;
        return _line;
    }
    public int[] IntArray()
    {
        return ToIntArray(Array());
    }
    public long[] LongArray()
    {
        return ToLongArray(Array());
    }
    public double[] DoubleArray()
    {
        return ToDoubleArray(Array());
    }
    #endregion
}

Measured memory_bytes: 15712