#include <bits/stdc++.h>
#define re register
#define int long long
#define Add(a,b) (((a) + (b)) % mod)
#define Sub(a,b) (((a) - (b) + mod) % mod)
#define Mul(a,b) ((a) * (b) % mod)

using namespace std;

const int mod = 1e9 + 7;
int l,r;

inline int read(){
    int r = 0,w = 1;
    char c = getchar();
    while (c < '0' || c > '9'){
        if (c == '-') w = -1;
        c = getchar();
    }
    while (c >= '0' && c <= '9'){
        r = (r << 3) + (r << 1) + (c ^ 48);
        c = getchar();
    }
    return r * w;
}

inline int f(int x){
    int sum = 0;
    while (x != 1){
        sum++;
        if (x & 1) x++;
        else x /= 2;
    }
    return sum;
}

inline int calc(int x){
    if (x <= 1) return 0;
    int t = x / 2;
    if (x & 1) return Add(calc(2 * t),f(x));
    else return Add(Add(Mul(2,calc(t)),t - 1),x - 1);
}

signed main(){
    l = read(),r = read();
    printf("%lld",Sub(calc(r),calc(l - 1)));
    return 0;
}