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#include <bits/stdc++.h>
using namespace std;
#define PII pair<int, int>
#define PLL pair<LL, LL>
#define VI vector<int>
#define VPII vector<PII>
#define LL long long
#define LD long double
#define f first
#define s second
#define MP make_pair
#define PB push_back
#define pb pop_back
#define ALL(c) (c).begin(), (c).end()
#define SIZ(c) (int)(c).size()
#define REP(i, n) for(int i = 0; i < (int)(n); ++i)
#define FOR(i, b, e) for(int i = (b); i <= (int)(e); ++i)
#define FORD(i, b, e) for(int i = (b); i >= (int)(e); --i)

#define Sim template<class n
Sim, class s> ostream & operator << (ostream &p, pair<n, s> x)
{return p << "<" << x.f << ", " << x.s << ">";}
Sim> auto operator << (ostream &p, n y) -> 
typename enable_if<!is_same<n, string>::value, decltype(y.begin(), p)>::type 
{int o = 0; p << "{"; for(auto c: y) {if(o++) p << ", "; p << c;} return p << "}";}
void dor() {cerr << endl;}
Sim, class...s> void dor(n p, s...y) {cerr << p << " "; dor(y...);}
Sim, class s> void mini(n &p, s y) {if(p>y) p = y;}
Sim, class s> void maxi(n &p, s y) {if(p<y) p = y;}
#ifdef DEB
#define debug(...) dor(__FUNCTION__, ":", __LINE__, ": ", __VA_ARGS__)
#else
#define debug(...)
#endif 

#define I(x) #x " = ", (x), " "
#define A(a, i) #a "[" #i " = ", i, "] = ", a[i], " "
const int M = 1024 * 16;
const LL mod = 1e9 + 7;

LL sil[M], odw[M], res;
int n, r[3], inne[3];
char C[3][M];

LL poww(LL x, LL e)
{
	if (e == 0)
	{
		return 1;
	}
	if (e % 2 == 0)
	{
		return poww(x * x % mod, e / 2);
	}
	return x * poww(x, e - 1) % mod;
}

LL newt(int a, int b)
{
	assert(a >= b);
	return sil[a] * odw[b] % mod * odw[a - b] % mod;
}

LL solve2(int r1, int r2, int wsp, int inn)
{
	LL rr = 0;
	vector<LL> V;
	LL s = 0;
	FOR(i, 0, wsp)
	{
		V.PB(newt(wsp, i));
		V.back() += s;
		V.back() %= mod;
		s = V.back();
	}
	FOR(i, 0, inn)
	{
		int ind = min(r1 - i, r2 - inn + i);
		mini(ind, wsp);
		if (ind >= 0)
		{
			rr = (rr + newt(inn, i) * V[ind]) % mod;
		}
	}
	
	return rr;
}

vector<vector<LL>> A;

LL solve3()
{
	LL rr = 0;
	int wsp = n - inne[0] - inne[1] - inne[2];
	
	int wym = wsp + inne[2];
	A.resize(wym + 1);
	FOR(i, 0, wym)
	{
		A[i].resize(wym + 1);
	}
	vector<LL> nwsp, nin;
	FOR(i, 0, wsp)
	{
		nwsp.PB(newt(wsp, i));
	}
	FOR(i, 0, inne[2])
	{
		nin.PB(newt(inne[2], i));
	}
	FOR(i, 0, wsp)
	{
		FOR(j, 0, inne[2])
		{
			A[i + j][i - j + inne[2]] = nwsp[i] * nin[j] % mod;
		}
	}
	FOR(i, 1, wym)
	{
		A[0][i] += A[0][i - 1];
		if (A[0][i] >= mod)
		{
			A[0][i] -= mod;
		}
	}
	FOR(i, 1, wym)
	{
		A[i][0] += A[i - 1][0];
		if (A[i][0] >= mod)
		{
			A[i][0] -= mod;
		}
		FOR(j, 1, wym)
		{
			A[i][j] += A[i - 1][j] + A[i][j - 1] - A[i - 1][j - 1];
			while (A[i][j] >= mod)
			{
				A[i][j] -= mod;
			}
			while (A[i][j] <= 0)
			{
				A[i][j] += mod;
			}
		}
	}
	
	vector<LL> n1, n2;
	FOR(i, 0, inne[0])
	{
		n1.PB(newt(inne[0], i));
	}
	FOR(i, 0, inne[1])
	{
		n2.PB(newt(inne[1], i));
	}
	FOR(i, 0, inne[0])
	{
		FOR(j, 0, inne[1])
		{
			int r0 = r[0] - j - (inne[0] - i);
			int r1 = r[1] - i - (inne[1] - j);
			int r2 = r[2] - i - j;
			if (r0 < 0 || r1 < 0 || r2 < 0)
			{
				continue;
			}
			int mxsum = min(r0, r1);
			int mxdiff = r2 - inne[2];
			int plus = min(wym, mxsum);
			int minus = min(wym, mxdiff + inne[2]);
			rr = (rr + n1[i] * n2[j] % mod * A[plus][minus]) % mod;
		}
	}
	return rr;
}

int32_t main()
{
	//ios_base::sync_with_stdio(0);
	//cin.tie(NULL);
	sil[0] = 1;
	odw[0] = 1;
	FOR(i, 1, M - 1)
	{
		sil[i] = sil[i - 1] * i % mod;
		odw[i] = poww(sil[i], mod - 2);
	}
	scanf("%d", &n);
	FOR(i, 0, 2)
	{
		scanf("%d%s", r + i, C[i]);
		FOR(j, 0, r[i])
		{
			res += newt(n, j);
		}
	}
	res %= mod;
	FOR(i, 0, 2)
	{
		int wsp = 0;
		FOR(j, 0, n - 1)
		{
			if (C[(i + 1) % 3][j] == C[(i + 2) % 3][j])
			{
				wsp++;
			}
		}
		res -= solve2(r[(i + 1) % 3], r[(i + 2) % 3], wsp, n - wsp);
		if (res < 0)
		{
			res += mod;
		}
	}
	FOR(i, 0, 2)
	{
		FOR(j, 0, n - 1)
		{
			if (C[i][j] != C[(i + 1) % 3][j] && C[i][j] != C[(i + 2) % 3][j])
			{
				inne[i]++;
			}
		}
	}
	res += solve3();
	if (res >= mod)
	{
		res -= mod;
	}
	
	printf("%lld\n", res);
	return 0;
}