task1

def buildLargest(l1,l2):
    l = len(l1)
    output = []
    for i in range(l):
        temp = []
        for j in range(l):
            if l1[i][j] > l2[i][j]:
                temp.append(l1[i][j])
            else:
                temp.append(l2[i][j])
        output.append(temp)

    return output