# 15(15) РТ

for a in range(1, 1000):
    a_podoshel = True
    for x in range(1, 1000):
        for y in range(1,1000):
            if ((3 * y - x < a) or (x >= 35)or (y >= 51)) == False:
                a_podoshel = False
                break
        if a_podoshel == False:
            break
    if a_podoshel == True:
        print(a)
# 15(15) РТ