#include<stdio.h>

int main()
{
    int B,E;
    int i,j,x=0,y=0,count=0;
    int sum1=0,sum2=0,n=0;
    scanf("%d %d",&B,&E);
    int a[B],b[E];
    char c[B],d[E];
    for(i=0;i<B;i++){
        scanf("%d %c\n",&a[i],&c[i]);
    }
    for(i=0;i<E;i++){
        scanf("%d %c\n",&b[i],&d[i]);
    }
    for(i=0;i<B;i++){
        sum1+=a[i];
    }
    for(i=0;i<E;i++){
        sum2+=b[i];
    }
    char cn[sum1],dn[sum2];
    for(i=0;i<B;i++){
        for(j=0;j<a[i];j++){
            cn[n]=c[i];
            n+=1;
        }
    }
    n=0;
    for(i=0;i<E;i++){
        for(j=0;j<b[i];j++){
            dn[n]=d[i];
            n+=1;
        }
    }
    if(sum1>=sum2){
        for(i=0;i<sum2;i++){
            if(cn[i]=='R') x++;
            if(cn[i]=='L') x--;
            if(dn[i]=='R') y++;
            if(dn[i]=='L') y--;
            if(x==y) count+=1;
        }
        for(i=0;i<sum1-sum2;i++){
            if(cn[i+sum2]=='R') x++;
            if(cn[i+sum2]=='L') x--;
            if(x==y) count+=1;  
        }
    }
    if(sum1<sum2){
        for(i=0;i<sum1;i++){
            if(cn[i]=='R') x++;
            if(cn[i]=='L') x--;
            if(dn[i]=='R') y++;
            if(dn[i]=='L') y--;
            if(x==y) count+=1;

        }
        for(i=0;i<sum2-sum1;i++){
            if(dn[i+sum1]=='R') y++;
            if(dn[i+sum1]=='L') y--;
            if(x==y) count+=1;
        }
    }
    printf("%d",count);
    return 0;
}