#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
typedef long long ll;
int n,m,c[105][3];
ll f[40][80][80];
char ch[5];
bool ck(int a,int b,int fl)
{if(fl==1){for(int i=1,x,y;i<=m;i++){x=c[i][1]; y=c[i][2];if((x==a&&y==b)||(x==b&&y==a)&&c[i][0]!=1)return 0;if((x==a||x==b)&&y>b&&(c[i][0]!=4&&c[i][0]!=2))return 0;if((y==a||y==b)&&x>b&&(c[i][0]!=5&&c[i][0]!=3))return 0;}return 1;}if(fl==0){for(int i=1,x,y;i<=m;i++){x=c[i][1]; y=c[i][2];if((x==a&&y==b)||(x==b&&y==a)&&c[i][0]!=1)return 0;if((x==a||x==b)&&y<a&&(c[i][0]!=4&&c[i][0]!=2))return 0;if((y==a||y==b)&&x<a&&(c[i][0]!=5&&c[i][0]!=3))return 0;}return 1;}if(fl==2){for(int i=1,x,y;i<=m;i++){x=c[i][1]; y=c[i][2];if((x==a&&y==b)||(x==b&&y==a)&&c[i][0]!=1)return 0;if((x==a||x==b)&&(y>a&&y<b)&&(c[i][0]!=4&&c[i][0]!=2))return 0;if((y==a||y==b)&&(x>a&&x<b)&&(c[i][0]!=5&&c[i][0]!=3))return 0;}return 1;}if(fl==4){for(int i=1,x=c[i][1],y=c[i][2];i<=m;i++,x=c[i][1],y=c[i][2])if((x==a&&y==b)||(x==b&&y==a)&&(c[i][0]==2||c[i][0]==3))return 0;return 1;}
}
int main()
{scanf("%d%d",&n,&m);for(int i=1;i<=m;i++){scanf("%d %s %d",&c[i][1],&ch,&c[i][2]);if(ch[0]=='=')c[i][0]=1;else if(ch[0]=='<'&&ch[1]=='=')c[i][0]=4;else if(ch[0]=='>'&&ch[1]=='=')c[i][0]=5;else if(ch[0]=='<')c[i][0]=2;else if(ch[0]=='>')c[i][0]=3;}for(int i=1;i<2*n;i++)if(ck(i,i+1,4))f[n][i][i+1]=1;for(int i=n-1;i;i--)for(int l=1;l<=2*n;l++)for(int r=l+1;r<=2*n;r++)if(f[i+1][l][r]){
//                    printf("i=%d l=%d r=%d\n",i,l,r);int x,y;if(l>2){x=l-2,y=l-1;if(ck(x,y,1))f[i][x][r]+=f[i+1][l][r];
//                                         printf("f[%d][%d][%d]=%d\n",i,x,r,f[i][x][r]);
                    }if(r+2<=2*n){x=r+1,y=r+2;if(ck(x,y,0))f[i][l][y]+=f[i+1][l][r];
//                                         printf("f[%d][%d][%d]=%d\n",i,l,y,f[i][l][y]);
                    }if(l>1&&r+1<=2*n){x=l-1; y=r+1;if(ck(x,y,2))f[i][x][y]+=f[i+1][l][r];
//                                         printf("f[%d][%d][%d]=%d\n",i,x,y,f[i][x][y]);
                       }}printf("%lld\n",f[1][1][n<<1]);return 0;
}