#include <algorithm>
#include <iostream>
#include <vector>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <set>

using namespace std;

namespace fastinput {
	/** Interface */

	template <class T = int> inline T readInt();
	inline double readDouble();
	inline int readUInt();
	inline int readChar();
	inline void readWord(char *s);
	inline bool readLine(char *s); // do not save '\n'
	inline bool isEof();
	inline int peekChar();
	inline bool seekEof();

	template <class T> inline void writeInt(T x, int len = -1);
	template <class T> inline void writeUInt(T x, int len = -1);
	inline void writeChar(int x);
	inline void writeWord(const char *s);
	inline void writeDouble(double x, int len = 0);
	inline void flush();

	/** Read */

	static const int buf_size = 4096;

	static char buf[buf_size];
	static int buf_len = 0, buf_pos = 0;

	inline bool isEof() {
		if (buf_pos == buf_len) {
			buf_pos = 0, buf_len = fread(buf, 1, buf_size, stdin);
			if (buf_pos == buf_len)
				return 1;
		}
		return 0;
	}

	inline int getChar() {
		return isEof() ? -1 : buf[buf_pos++];
	}

	inline int peekChar() {
		return isEof() ? -1 : buf[buf_pos];
	}

	inline bool seekEof() {
		int c;
		while ((c = peekChar()) != -1 && c <= 32)
			buf_pos++;
		return c == -1;
	}

	inline int readChar() {
		int c = getChar();
		while (c != -1 && c <= 32)
			c = getChar();
		return c;
	}

	inline int readUInt() {
		int c = readChar(), x = 0;
		while ('0' <= c && c <= '9')
			x = x * 10 + c - '0', c = getChar();
		return x;
	}

	template <class T>
	inline T readInt() {
		int s = 1, c = readChar();
		T x = 0;
		if (c == '-')
			s = -1, c = getChar();
		while ('0' <= c && c <= '9')
			x = x * 10 + c - '0', c = getChar();
		return s == 1 ? x : -x;
	}

	inline double readDouble() {
		int s = 1, c = readChar();
		double x = 0;
		if (c == '-')
			s = -1, c = getChar();
		while ('0' <= c && c <= '9')
			x = x * 10 + c - '0', c = getChar();
		if (c == '.') {
			c = getChar();
			double coef = 1;
			while ('0' <= c && c <= '9')
				x += (c - '0') * (coef *= 1e-1), c = getChar();
		}
		return s == 1 ? x : -x;
	}

	inline void readWord(char *s) {
		int c = readChar();
		while (c > 32)
			*s++ = c, c = getChar();
		*s = 0;
	}

	inline bool readLine(char *s) {
		int c = getChar();
		while (c != '\n' && c != -1)
			*s++ = c, c = getChar();
		*s = 0;
		return c != -1;
	}

	/** Write */

	static int write_buf_pos = 0;
	static char write_buf[buf_size];

	inline void writeChar(int x) {
		if (write_buf_pos == buf_size)
			fwrite(write_buf, 1, buf_size, stdout), write_buf_pos = 0;
		write_buf[write_buf_pos++] = x;
	}

	inline void flush() {
		if (write_buf_pos)
			fwrite(write_buf, 1, write_buf_pos, stdout), write_buf_pos = 0;
	}

	template <class T>
	inline void writeInt(T x, int output_len) {
		if (x < 0)
			writeChar('-'), x = -x;

		char s[24];
		int n = 0;
		while (x || !n)
			s[n++] = '0' + x % 10, x /= 10;
		while (n < output_len)
			s[n++] = '0';
		while (n--)
			writeChar(s[n]);
	}

	template <class T>
	inline void writeUInt(T x, int output_len) {
		char s[24];
		int n = 0;
		while (x || !n)
			s[n++] = '0' + x % 10, x /= 10;
		while (n < output_len)
			s[n++] = '0';
		while (n--)
			writeChar(s[n]);
	}

	inline void writeWord(const char *s) {
		while (*s)
			writeChar(*s++);
	}

	inline void writeDouble(double x, int output_len) {
		if (x < 0)
			writeChar('-'), x = -x;
		int t = (int)x;
		writeUInt(t), x -= t;
		writeChar('.');
		for (int i = output_len - 1; i > 0; i--) {
			x *= 10;
			t = std::min(9, (int)x);
			writeChar('0' + t), x -= t;
		}
		x *= 10;
		t = std::min(9, (int)(x + 0.5));
		writeChar('0' + t);
	}
}

using namespace fastinput;

const int N = 500;

string s[2];

const int CLR = 3;
const int MOD = 1e9 + 7;

int dp[CLR][CLR][N];

void add(int& a, int b) {
	a += b;
	if (a >= MOD)
		a -= MOD;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin >> n;
	cin >> s[0] >> s[1];
	if (s[0][0] == s[1][0]) {
		for (int i = 0; i < CLR; ++i) {
			dp[i][i][0] = 1;
		}
	} else {
		for (int i = 0; i < CLR; ++i) {
			for (int j = 0; j < CLR; ++j) {
				dp[i][j][0] = i != j;
			}
		}
	}
	for (int i = 0; i + 1 < n; ++i) {
		for (int u = 0; u < CLR; ++u) {
			for (int v = 0; v < CLR; ++v) {
				if (dp[u][v][i])
					for (int a = 0; a < CLR; ++a) {
						if (s[0][i] == s[0][i + 1] && a != u)
							continue;
						if (s[0][i] != s[0][i + 1] && a == u)
							continue;							
						for (int b = 0; b < CLR; ++b) {
							if (s[1][i] == s[1][i + 1] && b != v)
								continue;
							if (s[1][i] != s[1][i + 1] && b == v)
								continue;

							if (s[0][i + 1] == s[1][i + 1]) {
								if (a == b) {
									add(dp[a][b][i + 1], dp[u][v][i]);
								}								
							} else {
								if (a != b) {
									add(dp[a][b][i + 1], dp[u][v][i]);
								}
							}				
						}
					}
			}
		}
	}
	int total = 0;
	for (int i = 0; i < CLR; ++i) 
		for (int j = 0; j < CLR; ++j)
			add(total, dp[i][j][n - 1]);
	cout << total << endl;
		
	return 0;
}

Measured memory_bytes: 256