#include "stdio.h"
#include "stdlib.h"
#define MAXN 536870911

int v[MAXN];

int collatz(unsigned long long n) {
    unsigned long long ini=n;
    int counter=0;

    if (n==1)
        return 0;

    while (n!=1) {
        printf("v[%llu]: %d\n", n, v[n]);
        if (v[n]!=0) {
            counter+=v[n];
            break;
        }

        if (n%2==0) {
            counter++;
            n/=2;
        }
        else {
            counter+=2;
            n = (3*n+1)/2;
        }
    }

    v[ini] = counter;

    return counter;
}

int main() {
    unsigned long long i, j, k;

    scanf("%llu%llu", &i, &j);

    for (k=i; k<=j; k++)
        printf("%llu: %d\n", k, collatz(k));

    return 0;
}