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#include <vector>
#include <iostream>
#include <sstream>
#include <math.h>
#include <sys/time.h>
#include <cstdlib>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <fstream>
#include <set>

#define FOR(i,a,b)  for(__typeof(b) i=(a);i<(b);++i)
#define REP(i,a)    FOR(i,0,a)
#define FOREACH(x,c)   for(__typeof(c.begin()) x=c.begin();x != c.end(); x++)
#define ALL(c)      c.begin(),c.end()
#define CLEAR(c)    memset(c,0,sizeof(c))
#define SIZE(c) (int) ((c).size())

#define PB          push_back
#define MP          make_pair
#define X           first
#define Y           second

#define ULL         unsigned long long
#define LL          long long
#define LD          long double
#define II         pair<int, int>
#define DD         pair<double, double>

#define VC	    vector
#define VI          VC<int>
#define VVI         VC<VI>
#define VD          VC<double>
#define VS          VC<string>
#define VII         VC<II>
#define VDD         VC<DD>
#define UI  unsigned int
#define VUI VC<UI>

#define DB(a)       cerr << #a << ": " << a << endl;

using namespace std;

template<class T> void print(VC < T > v) {cerr << "[";if (SIZE(v) != 0) cerr << v[0]; FOR(i, 1, SIZE(v)) cerr << "," << v[i]; cerr << "]\n";}
template<class T> string i2s(T &x) { ostringstream o; o << x; return o.str(); }
VS split(string &s, char c = ' ') {VS all; int p = 0, np; while (np = s.find(c, p), np >= 0) {if (np != p) all.PB(s.substr(p, np - p)); p = np + 1;} if (p < SIZE(s)) all.PB(s.substr(p)); return all;}

int n,m;
int conf;
int sz[24];
int bin[100];

// 2^24
#define P_MAX 16777216

UI p[P_MAX];
LL T[P_MAX];

void readData(){
    scanf("%d%d",&n,&m);
    REP(i,n) scanf("%d",&(sz[i]));
    REP(i,m) scanf("%d",&(bin[i]));
    sort(begin(bin),end(bin),greater<int>());
    sort(begin(sz),end(sz),greater<int>());
    m = min(m,n);
    REP(i,m) if (bin[i] < sz[n-1]){ m = i; break;}
    conf = 1 << n;
}

void genPack(UI bs){
    p[0] = 0;
    int len = 1;
    REP(i,n){
        UI s = sz[i];
        for(int j=0, k=len; j<len; j++,k++)
            p[k] = p[j] + s;
        len *= 2;
    }
    REP(i,len)
        p[i] = (p[i] <= bs);
}

void ipZeta(){
    /*REP(i,n){
        UI mask = 1<<i;
        for(int j=conf-1, k=conf-1-mask; k>=0; j--, k--)
            p[j] += (j&mask)?p[k]:0;
    }*/
    
    REP(i,n){
        UI mask = 1<<i;
        for(int j=conf-1, jm=conf-1-mask; jm >= 0; (j-=mask), (jm-=mask)){
            for(int k=0; k < mask; k++, j--, jm--)
                p[j] += p[jm];
        }
    }
}

#define MOD 1000000007

void xInit(){
    REP(i,conf)
        T[i] = 1;
}

void xMul(){
    REP(i,conf)
        T[i] = (p[i] * T[i]) % MOD;
}

char sign[P_MAX];

void incExcInit(){
    sign[0] = 1;
    int s = 1;
    REP(i,n){
        for(int j=0, k=s; j<s; j++,k++) sign[k] = 1-sign[j];
        s *= 2;
    }
}

int incExc(){
    LL sol = 0;
    REP(i,conf){
        /*int bits = __builtin_popcount(i);
        if (bits % 2)
            sol -= T[i];
        else
            sol += T[i];*/
        sol += sign[i]?T[i]:(-T[i]);
    }    
    return ((sol%MOD) != 0);
}

int solve(){
    xInit();
    incExcInit();
    int totSz = 0;
    int totBin = 0;
    REP(i,n) totSz += sz[i];
    REP(i,m){
        genPack(bin[i]);
        ipZeta();
        xMul();
        totBin += bin[i];
        if (totBin >= totSz && incExc()) return (i+1);
    }
    return -1;
}

int main(int argc, char *argv[]){
    readData();
    int res = solve();
    if (res == -1)
        printf("NIE\n");
    else
        printf("%d\n",res);
    return 0;
}