def organizingContainers(container):
    # Write your code here
    n = len(container)
    capacity = []
    type_count = []
    for i in range(n):
        capacity.append(sum(container[i]))
        current_total = 0
        for j in range(n):
            current_total += container[j][i]
            
        type_count.append(current_total)
                  
    return "Possible" if sorted(capacity) == sorted(type_count) else "Impossible"