std

#include <cstdio>
#include <cstring>

const int maxn = 200000+10;

int q, n;
char l[2][maxn];
bool ok;

//1左, 3上, 4下 
void dfs(int line, int col, int last) {
    //printf("dfs(line=%d, col=%d, last=%d)\n", line, col, last);
    if(col==n && line==0) return;
    if(col==n && line==1) { ok = true; return; }
    if(l[line][col]=='1' || l[line][col]=='2') {
        if(last==3 || last==4) return;
        dfs(line, col+1, last);
    } else {
        if(last == 1) {
            if(line == 0) dfs(1, col, 3);
            else dfs(0, col, 4);
        } else if(last == 3) dfs(1, col+1, 1);
        else if(last == 4) dfs(0, col+1, 1);
    }
}

int main() {
    scanf("%d", &q);
    while(q--) {
        memset(l, 0, sizeof(l)); ok = false;
        scanf("%d", &n);
        scanf("%s%s", l[0], l[1]);
        dfs(0, 0, 1);
        if(ok) printf("YES\n");
        else printf("NO\n");
    }
    return 0;
}