#include<bits/stdc++.h>
#define endl '\n'
using namespace std;

void f()
{
    freopen("printing.in", "r", stdin);
    freopen("printing.out", "w", stdout);
}

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

int n;
string s;
int a, b, m, d, h;
int price[27];

void read()
{
    cin>>n;
    cin>>s;
    cin>>a>>b>>m>>d>>h;
    for(int i=0; i<27; i++)
    {
        cin>>price[i];
    }
}

int used[29];
char str[27];
int cnt;
int pos[29];
int str_cnt;

void separate()
{
    cnt=1;
    str_cnt=0;
    for(int i=0; i<s.size(); i++)
    {
        if(!used[s[i]-'a'+2])
        {
            used[s[i]-'a'+2]=1;
            str[cnt]=s[i];
            pos[s[i]-'a'+2]=cnt;
            cnt++;
            str_cnt++;
        }
    }
}

void solve()
{

    if(str_cnt<s.size())
    {
        cout<<str_cnt<<endl;
        for(int i=1; i<=str_cnt; i++)
        {
            cout<<str[i]<<endl;
        }

        int br=0;
        cnt=1;
        for(int i=0; i<s.size(); i++)
        {
            if(s[i]==str[cnt])
            {
                br++;
            }
            else
            {
                cnt=pos[s[i]-'a'+2];
                br+=2;
            }
        }

        cout<<br<<endl;
        br=0;
        cnt=1;
        for(int i=0; i<s.size(); i++)
        {
            if(s[i]==str[cnt])
            {
                cout<<"w"<<" "<<1<<endl;
                br++;
            }
            else
            {
                cout<<"cd"<<" "<<pos[s[i]-'a'+2]<<endl;
                cnt=pos[s[i]-'a'+2];
                cout<<"w"<<" "<<1<<endl;
                br+=2;
            }
        }
    }
    else if(str_cnt==s.size())
    {
        if(price[1] < price[str_cnt])
        {
            cout<<1<<endl;
            for(int i=1; i<=str_cnt; i++)
            {
                cout<<str[i];
            }
            cout<<endl;

            cout<<1<<endl;
            cout<<"w"<<" "<<str_cnt<<endl;
        }
        else
        {
            cout<<str_cnt<<endl;
            for(int i=1; i<=str_cnt; i++)
            {
                if(s[i-1]==str[i])
                {
                    cout<<"w"<<" "<<1<<endl;
                }
                else
                {
                    cout<<"cd"<<" "<<i+1<<endl;
                    cout<<"w"<<" "<<1<<endl;
                }
            }
        }
    }
}

int main()
{
    f();
    speed();
	read();
	separate();
	solve();
	/*cout<<endl;
	cout<<endl;
	for(int i=1; i<=str_cnt; i++)
    {
        cout<<str[i]<<" ";
    }
    cout<<"..."<<endl;*/
    return 0;
}