#include<iostream>
#include<string.h>
#include<stdio.h>
#include<math.h>
#include<vector>
using namespace std;
const int N=1005;
int n,m;
char c[N][N];
int dp[N][N];
bool bi[N][N];
int cnt=0;
signed main()
{
	while(scanf("%d%d",&n,&m)!=EOF)
	{
		cnt=0;
		memset(dp,0,sizeof dp);
		memset(bi,0,sizeof bi);
		for(int i=0;i<n;i++)
		{
			scanf("%s",c[i]);
		}
		
		
		//1 c[i][j]=='^'&&c[i][j+2]=='^'&&c[i+1][j+1]=='v'
		//2 c[i+1][j]=='v'&&c[i+1][j+2]=='v'&&c[i][j+1]=='^'
		//3 c[i][j]=='<'&&c[i+2][j]=='<'&&c[i+1][j+1]=='>'
		//4 c[i][j+1]=='>'&&c[i+2][j+1]=='>'&&c[i+1][j]=='<'
		
		for(int i=0;i<n;i++)
		{
			for(int j=0;j<m;j++)
			{
				if(c[i][j]=='^'&&c[i][j+2]=='^'&&c[i+1][j+1]=='v'&&!bi[i][j]&&!bi[i][j+2]&&!bi[i+1][j+1])
				{

					bi[i][j]=bi[i][j+2]=bi[i+1][j+1]=1;
					cnt++;
				}
				if(c[i+1][j]=='v'&&c[i+1][j+2]=='v'&&c[i][j+1]=='^'&&!bi[i+1][j]&&!bi[i+1][j+2]&&!bi[i][j+1])
				{
					bi[i+1][j]=bi[i+1][j+2]=bi[i][j+1]=1;	
					cnt++;
				}			
				
				if(c[i][j]=='<'&&c[i+2][j]=='<'&&c[i+1][j+1]=='>'&&!bi[i][j]&&!bi[i+2][j]&&!bi[i+1][j+1])
				{
					bi[i][j]=bi[i+2][j]=bi[i+1][j+1]=1;
					cnt++;

				}
				if(c[i][j+1]=='>'&&c[i+2][j+1]=='>'&&c[i+1][j]=='<'&&!bi[i][j+1]&&!bi[i+2][j+1]&&!bi[i+1][j])
				{
					bi[i][j+1]=bi[i+2][j+1]=bi[i+1][j]=1;
					cnt++;
				}
			}
		}
        printf("%d\n",cnt);

	}
	return 0;
}