#include<bits/stdc++.h>
#define sz(x) (int)(x).size()
#define f first
#define s second
#define pb push_back
#define ll long long
#define all(x) (x).begin(),(x).end()
using namespace std;
// 19:33
const int N=20001;
bool moze[N][N];
int visited[N];
bool inc[N];
int nxt[N];
int need[N];
bool mid[N][N],up[N][N],down[N][N];
int dfs(int tr){
    if(nxt[tr]==-1){
        inc[tr]=0;
        visited[tr]=1;
        return -1;
    }
    if(visited[nxt[tr]]==1){
        inc[tr]=0;
        visited[tr]=1;
        return -1;
    }
    if(visited[nxt[tr]]==2){
        inc[tr]=1;
        visited[tr]=1;
        return nxt[tr];
    }
    visited[tr]=2;
    int r=dfs(nxt[tr]);
    visited[tr]=1;
    if(r==-1){
        inc[tr]=0;
        return -1;
    }
    else{
        inc[tr]=1;
        if(tr==r)return -1;
        return r;
    }
}
int main(){
    string s;
    cin >> s;
    int n=sz(s);
    for(int i=0;i<n;i++){
        for(int j=i;j<n;j++){
            mid[i][j]=s[i]!='L'&&s[j]!='R';
            up[i][j]=s[j]!='U';
            down[i][j]=s[j]!='D';
            if(i!=j){
                up[i][j]=up[i][j]&&up[i][j-1];
                down[i][j]=down[i][j]&&down[i][j-1];
            }
        }
    }
    vector<pair<int,int>> its;
    for(int len=1;len<=n;len++){
        for(int i=0;i<n;i++){
            inc[i]=0;
            visited[i]=0;
            if(s[i]=='L'){
                nxt[i]=i-1;
            }
            if(s[i]=='R'){
                nxt[i]=i==n-1?-1:i+1;
            }
            if(s[i]=='U'){
                nxt[i]=i<len?-1:i-len;
            }
            if(s[i]=='D'){
                nxt[i]=i>=n-len?-1:i+len;
            }
            need[i]=0;
        }
        for(int i=0;i<n;i++){
            if(!visited[i]){
                dfs(i);
            }
            if(nxt[i]==-1||!inc[i]){
                need[i]=-1;
            }
            if(need[i]==-1)continue;
            if(nxt[i]>i){
                need[i]=max(need[i],nxt[i]);
            }
            else{
                need[nxt[i]]=max(need[nxt[i]],i);
            }
        }
        its.clear();
        int r=0;
        int lst=0;
        for(int i=0;i<n;i++){
            if(need[i]==-1){
                lst=i+1;
                r=i+1;
                continue;
            }
            r=max(r,need[i]);
            if(r==i){
                its.pb({lst,r});
                lst=i+1;
                r=i+1;
            }
        }
        for(int i=0;i<sz(its);i++){
            int tr=its[i].f;
            bool ok=up[tr][tr+len-1]&&mid[tr][tr+len-1];
            tr+=len;
            for(int j=i;ok&&j<sz(its);j++){
                int en=its[j].s;
                while(tr+len-1<=en){
                    if(!mid[tr][tr+len-1]){
                        ok=0;
                        break;
                    }
                    tr+=len;
                }
                if(!ok)break;
                if(en+1==tr&&down[tr-len][tr-1]){
                    moze[its[i].f][its[j].s]=1;
                }
                if(j==sz(its)-1)continue;
                if(its[j+1].f!=its[j].s+1)break;
            }
        }
        /*printf("%i:\n",len);
        for(auto p:its){
            printf("%i - %i\n",p.f,p.s);
        }*/
    }
    int ans=0;
    for(int i=0;i<n;i++)for(int j=i;j<n;j++)ans+=moze[i][j];
    printf("%i\n",ans);
}

/*
bool mid[N][N],up[N][N],down[N][N];
bool moze[N];
int main(){
    string s;
    cin >> s;
    int n=sz(s);
    for(int i=0;i<n;i++){
        for(int j=i;j<n;j++){
            mid[i][j]=s[i]!='L'&&s[j]!='R';
            up[i][j]=s[j]!='U';
            down[i][j]=s[j]!='D';
            if(i!=j){
                up[i][j]=up[i][j]&&up[i][j-1];
                down[i][j]=down[i][j]&&down[i][j-1];
            }
        }
    }
    int ans=0;
    for(int i=0;i<n;i++){
        for(int j=0;j<i;j++)moze[j]=0;
        for(int len=0;len<=i;len++){
            if(mid[i-len][i]&&down[i-len][i]){
                int tr=i;
                while(tr-len>=0){
                    if(!mid[tr-len][tr])break;
                    if(up[tr-len][tr]&&!moze[tr-len]){
                        moze[tr-len]=1;
                        ans++;
                        printf("%i %i\n",tr-len,i);
                    }
                    tr=tr-len-1;
                }
            }
        }
    }
    */