def can_take_courses(c,n,size, v):
    if n ==0:
        print(v)
        return
    if size==0:
        return

    can_take_courses(c,n, size-1, v)
    arr = v.copy()
    arr.append(c[size-1])
    can_take_courses(c,n-c[size-1], size-1, arr)

v = []
can_take_courses([1,2,3,4], 5, 4, v)