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#include<bits/stdc++.h>
#define ff first
#define ss second
#define mp make_pair
#define pb push_back
#define gcu getchar_unlocked
using namespace std;
typedef pair<int,int> pp;
typedef long double ld;
const ld eps=1e-10;
void read(vector<pp> &v)
{
	string s;
	cin>>s;
	s+=".";
	int last=-1,n=(int)s.size();
	for(int i=1;i<n;++i)
	{
		char I = s[i];
		if(I=='.')
		{
			if(last!=-1)
			{
				v.pb(mp(last,i-1));
				last=-1;
			}
		}
		if(I=='#')
		{
			if(last==-1)
			{
				last=i;
			}	
		}
	}
}
struct pos
{
	ld ti;
	int x,y;
};
bool operator<(const pos &a,const pos &b)
{
	return (a.ti>b.ti) || (a.ti==b.ti && a.y>b.y) || (a.ti==b.ti && a.y==b.y && a.x>b.x);
}
void out(ld wyn)
{
	cout<<setprecision(15)<<fixed<<wyn<<endl;
	exit(0);
}
int main()
{
	int n,v0,v1,v2,v3;
	scanf("%d%d%d%d%d",&n,&v0,&v1,&v2,&v3);
	vector<pp> a1,a2,a3;
	read(a1);
	read(a2);
	read(a3);
//	for(auto I : a1)	printf("(%d %d), ",I.ff,I.ss);
//	printf("\n");
//	for(auto I : a2)	printf("(%d %d), ",I.ff,I.ss);
//	printf("\n");
//	for(auto I : a3)	printf("(%d %d), ",I.ff,I.ss);
//	printf("\n");
	vector<ld> c1(a1.size(),1000000000.0),c2(a2.size(),1000000000.0),c3(a3.size(),1000000000.0);
	ld wyn=1000000000.0;
	priority_queue<pos> pq;
	if(!a1.empty())		pq.push({((ld)(a1[0].ff-1))/(v0-v1),1,0});
	if(!a2.empty())		pq.push({((ld)(a2[0].ff-1))/(v0-v2),2,0});
	if(!a3.empty())		pq.push({((ld)(a3[0].ff-1))/(v0-v3),3,0});
//	printf("11\n");
	while(!pq.empty())
	{
		pos tmp=pq.top();
		pq.pop();
		ld ti=tmp.ti;
//		printf(">  %Lf  %d %d\n",ti,tmp.x,tmp.y);
		if(tmp.x==1)
		{
	
			if(abs(c1[tmp.y]-1000000000.0)<eps)	c1[tmp.y]=ti;
			else	continue;
//			printf("kk\n");
			int siz=(int)a2.size();
			for(int i=0;i<siz;++i)
			{
				ld inter=((ld)a1[tmp.y].ff-a2[i].ff)/(v2-v1);
//				printf("inter %d: %Lf\n",i,inter);
				if(inter>=ti)	pq.push({inter,2,i});
			}
			siz=(int)a1.size();
//			for(int i=0;i<siz;++i)
//			{
				
//			}
		}
		if(tmp.x==2)
		{
			if(abs(c2[tmp.y]-1000000000.0)<eps)	c2[tmp.y]=ti;
			else	continue;
			int siz=(int)a1.size();
			for(int i=0;i<siz;++i)
			{
				ld inter=((ld)a2[tmp.y].ff-a1[i].ff)/(v1-v2);
				if(inter<ti)	continue;
				pq.push({inter,1,i});
			}
			siz=(int)a3.size();
			for(int i=0;i<siz;++i)
			{
				ld inter=((ld)a2[tmp.y].ff-a3[i].ff)/(v3-v2);
				if(inter<ti)	continue;
				pq.push({inter,3,i});
			}
		}
		if(tmp.x==3)
		{
			if(abs(c3[tmp.y]-1000000000.0)<eps)	c3[tmp.y]=ti;
			else	continue;
			int siz=(int)a2.size();
			for(int i=0;i<siz;++i)
			{
				ld inter=((ld)a3[tmp.y].ff-a2[i].ff)/(v2-v3);
				if(inter<ti)	continue;
				pq.push({inter,2,i});
			}
		}	
	}
	for(int i=0;i<(int)a1.size();++i)
	{
//		printf(">%d %Lf\n",i,c1[i]);
		ld ti=c1[i];
		ld ot=ti+(!a2.empty() ? max((ld)0,((ld)a1[i].ff-a2.back().ss-2-ti*(v2-v1))/(v2-v1)) : (ld)0);
//		printf("%Lf\n",ot);
		ot+=max({(ld)0,!a1.empty() ? ((ld)a1.back().ss+2-a1[i].ff+ot*(v1-v1))/(v0-v1) : 0.0,!a2.empty() ? ((ld)a2.back().ss+2-a1[i].ff+ot*(v2-v1))/(v0-v2) : 0.0, !a3.empty() ? ((ld)a3.back().ss+2-a1[i].ff+ot*(v3-v1))/(v0-v3) : 0.0});
		wyn=min(wyn,ot);
//		printf("%Lf\n",wyn);
	}
	for(int i=0;i<(int)a2.size();++i)
	{
//		printf(">>%d %Lf\n",i,c2[i]);
		ld ti=c2[i];
		ld ot=ti+(!a3.empty() ? max((ld)0,((ld)a2[i].ff-a3.back().ss-2-ti*(v3-v2))/(v3-v2)) : (ld)0);
//		printf("%Lf\n",ot);
		ot+= max({(ld)0,!a1.empty() ? ((ld)a1.back().ss+2-a2[i].ff + ot*(v1-v2))/(v0-v1) : 0.0,!a2.empty() ? ((ld)a2.back().ss+2-a2[i].ff + ot*(v2-v2))/(v0-v2) : 0.0, !a3.empty() ? ((ld)a3.back().ss+2-a2[i].ff + ot*(v3-v2))/(v0-v3) : 0.0});
//		printf("%Lf\n",ot);
		wyn=min(wyn,ot);
	}
	printf("%.15Lf\n",wyn);
}