#include<bits/stdc++.h>
using namespace std;
constexpr int M=2e6+5;
int n,m,q,len,N,nxt[M],w[M],R[M];
string S,T,str; long long sum1[M],sum2[M];
int cnt[M],rnk[M],sa[M],id[M],oldrnk[M],height[M];
void SA(int n){ int m=255;
    for (int i=1;i<=m;i++) cnt[i]=0;
    for (int i=1;i<=n;i++) cnt[rnk[i]=str[i]]++;
    for (int i=1;i<=m;i++) cnt[i]+=cnt[i-1];
    for (int i=n;i;i--) sa[cnt[rnk[i]]--]=i;
    for (int lim=1;lim<=n;lim<<=1){ int num=0;
        for (int i=n-lim+1;i<=n;i++) id[++num]=i;
        for (int i=1;i<=n;i++) if (sa[i]>lim) id[++num]=sa[i]-lim;
        for (int i=1;i<=m;i++) cnt[i]=0; int idx=0;
        for (int i=1;i<=n;i++) cnt[rnk[id[i]]]++;
        for (int i=1;i<=m;i++) cnt[i]+=cnt[i-1];
        for (int i=n;i;i--) sa[cnt[rnk[id[i]]]--]=id[i];
        for (int i=1;i<=n;i++) oldrnk[i]=rnk[i];
        #define cmp(x,y) x+lim<=n&&y+lim<=n&&oldrnk[x]==oldrnk[y]&&oldrnk[x+lim]==oldrnk[y+lim]
        for (int i=1;i<=n;i++) rnk[sa[i]]=cmp(sa[i-1],sa[i])?idx:++idx;
        if ((m=idx)==n) break;
    }
    for (int i=1,k=0;i<=n;i++){ if (k) k--;
        while (i+k<=n&&sa[rnk[i]-1]+k<=n&&str[i+k]==str[sa[rnk[i]-1]+k]) k++;
        height[rnk[i]]=k;
    }
}
void solve(){
    cin>>n>>m>>q>>S>>T;
    str=S;str.erase(str.begin());
    str.pop_back();str+="@"+T;
    len=str.length();N=n-1;
    str=" "+str; S=" "+S; T=" "+T;
    SA(len);
    for (int i=2,j=0;i<=n;i++){
        while (j&&S[j+1]!=S[i]) j=nxt[j];
        nxt[i]=j+=S[j+1]==S[i];
    }
    // cerr<<str<<" !"<<endl;
    // for (int i=1;i<=len;i++) cerr<<sa[i]<<", ";cerr<<endl;
    // for (int i=1;i<=len;i++) cerr<<height[i]<<", ";cerr<<endl;
    // for (int i=1;i<=n;i++) cerr<<nxt[i]<<", ";cerr<<endl;
    for (int i=1;i<=n;i++) w[i]=0;
    for (int i=nxt[n];i;i=nxt[i]) w[n-i]++; w[n]=w[n-1]=0;
    // for (int i=1;i<=n;i++) cerr<<w[i]<<", ";cerr<<endl;
    for (int i=1;i<=n;i++) w[i]+=w[i-1];
    for (int i=1;i<=m;i++) R[i]=0;
    for (int i=1,tmp=0;i<=len;i++)
        if (sa[i]<N) tmp=INT_MAX;
        else R[sa[i]-N]=tmp=min(tmp,height[i]);
    // for (int i=1;i<=m;i++) cerr<<R[i]<<",, ";cerr<<endl;
    for (int i=len,tmp=0;i;i--)
        if (sa[i]<N) tmp=height[i];
        else R[sa[i]-N]=max(R[sa[i]-N],tmp),tmp=min(tmp,height[i]);
    // for (int i=1;i<=m;i++) cerr<<R[i]<<",, ";cerr<<endl;
    for (int i=1;i<=m;i++) sum1[i]=sum1[i-1]+w[R[i]];
    for (int i=1;i<=m;i++) sum2[i]=sum2[i-1]+w[i];
    while (q--){ long long ans=0;
        int ql,qr;cin>>ql>>qr;
        int l=ql,r=qr,p=qr+1;
        while (l<=r){
            int mid=l+r>>1;
            if (R[mid]>qr-mid+1) p=mid,r=mid-1;
            else l=mid+1;
        }
        if (ql<p) ans+=sum1[p-1]-sum1[ql-1];
        // for (int i=ql;i<p;i++) ans+=w[R[i]];
        if (p<=qr) ans+=sum2[qr-p+1];
        // for (int i=p;i<=qr;i++) ans+=w[qr-i+1];
        printf("%lld\n",ans);

    }
}
int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int T;cin>>T;while (T--) solve(); return 0;
}