list = []
while len(list) != 5:
    list1 = int(input("Введите число = "))
    list.append(list1)
print(list)
a = []
for i in range(len(list)):
    if list[i] > 0 and list[i - 1] > 0 and i != 0:
        a.append(list[i])
        a.append(list[i - 1])
        #print(list[i], list[i - 1])
    elif list[i] < 0 and list[i - 1] < 0 and i != 0:
        a.append(list[i])
        a.append(list[i - 1])
        #print(list[i], list[i - 1])
    if len(a) != 0:
        print(a[0], a[1], sep=" и ")
    elif len(a) == 0:
        pass

 li_st = [int(i) for i in input().split()]
for i in range (len(li_st)-1):
    if li_st[i]*li_st[i+1]>0:
        print(li_st[i],li_st[i+1])
        break

 l = [1, 4, -2, 3, -1, -1, 0, 78, 8, -7, 0, 2]
print([x for x in zip(l, l[1:]) if x[0] * x[1] > 0])

 for i in range(len(list)):
    if list[i] > 0 and list[i - 1] > 0 and i != 0:

 print([(x,y) for x,y in zip(l, l[1:]) if x*y > 0])[/quote]