def solve():
    v = list(map(int, input().split()))
    if v[3] == 10:
        print("Impossible")
        return
    print("Possible")
    n = 1
    num = (100, 50)
    t = 100
    c = 1
    ans = 0
    while n >= 0:
        ans += min(v[n], t) * num[n] * c
        v[n] -= t
        if v[n] <= 0:
            if v[n] == 0:
                c <<= 1
            else:
                t = -v[n]
            n -= 1
            continue
        c <<= 1
        t = 100
    print(ans)
solve()