In [ ]:

    

s1 = input("Enter string 1 : ")
s2 = input("Enter string 2 : ")
print(s1[1::2] + s2[::2])


    

In [ ]:

    

s1 = input("Enter string 1 : ")
s2 = input("Enter string 2 : ")

if len(s1) < len(s2):
    min_length = len(s1)
else:
    min_length = len(s2)
    
"".join([s1[i] if s1[i].isupper() else s2[i].upper() for i in range(0, min_length)])


    

In [ ]:

    

l = input("Enter length : ")
b = input("Enter breadth : ")
h = input("Enter height : ")
N = input("Enter N : ")

b = {(i, j, k) : abs(i) + abs(j) + abs(k) 
     for i in [0, int(l)]
     for j in [0, int(b)]
     for k in [0, int(h)]
     if abs(i) + abs(j) + abs(k) < int(N)}
print(b)


    

In [ ]:

    

a = [[1]]

b = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
c = [[1,   2,  3,  4,  5],
     [6,   7,  8,  9, 10],
     [11, 12, 13, 14, 15],
     [16, 17, 18, 19, 20],
     [21, 22, 23, 24, 25]]

def spiral(A):
    n = len(A)
    for i in range(0, n // 2 + 1):
        for j in range(i, n - i):
            print(A[i][j], end=', ')
        for j in range(i + 1, n - i):
            print(A[j][n - i - 1], end=', ')
        for j in range(n - i - 2, i - 1, -1):
            print(A[n - i - 1][j], end=', ')
        for j in range(n - i - 2, i, -1):
            print(A[j][i], end=', ')
    print()

spiral(a)            
spiral(b)
spiral(c)