// Author: YE Minghan
#include<bits/stdc++.h>
using namespace std;
#ifdef DEBUG
#include "templates/debug.h"
#define __int128 ll
#else
#define dbg(...) (void)0
#define msg(...) (void)0
#endif
#define ll long long
#define endl '\n'
#define PB emplace_back
#define PPB pop_back
#define MP make_pair
#define ALL(Name) Name.begin(),Name.end()
#define PII pair<int,int>
#define VI vector<int>
#define GI greater<int>
#define fi first
#define se second

char a[1005][1005];
void f(int x,int n)
{
	int l=x-n/2,r=x+n/2;
	for(int i=l;i<r;i++)a[l][i]='<',a[i][r]='^';
	for(int i=l+1;i<=r;i++)a[i][l]='v',a[r][i]='>';
	if(n==3)return;
	for(int i=l+2;i<r;i+=2)a[l+1][i]='v',a[r-1][i]='^',a[i][l+1]='>',a[i][r-1]='<';
	if(n==5)return;
	for(int i=l+3;i<r-1;i+=2)a[l+2][i]='^',a[r-2][i]='v',a[i][l+2]='<',a[i][r-2]='>';
	f(x,n-6);
}

int main()
{
	ios::sync_with_stdio(false),cin.tie(nullptr);
//	int _;cin>>_;while(_--)

	int n,m;
	cin>>n>>m;
	if(n==2&&m==2)return puts("Yes\n<^\nv>"),0;
	if(n!=m||n%6!=3&&n%6!=5)return puts("No"),0;
	memset(a,'.',sizeof(a));
	for(int i=0;i<n;i++)a[i][n]=0;
	f(n/2,n);
	puts("Yes");
	for(int i=0;i<n;i++)puts(a[i]);

	return 0;
}