a,b,c,d = map(int,input().split())
if d >= 10 :
    print("Imppossible")
else :
    print("Possible")
    c = 1
    d = 0
    ans = 0
    for i in range(a) :
        ans += c*100
        d += 1
        if d >= 100 :
            d = 0
            c += 1
    for i in range(b) :
        ans += c*50
        d += 1
        if d >= 100 :
            d = 0
            c += 1
    print(ans)