def organizingContainers(container):
    n = len(container)
    size_of_types = [0] * n
    size_of_containers = [0] * n

    for i in range(n):
        size_of_current_container = 0
        for j in range(n):
            size_of_types[j] += container[i][j]
            size_of_current_container += container[i][j]
        
        size_of_containers[i] += size_of_current_container

    return "Possible" if sorted(size_of_types) == sorted(size_of_containers) else "Impossible"