https://imagizer.imageshack.com/img901/2613/QF4oGs.jpg
https://imagizer.imageshack.com/img633/9349/YM6m86.jpg
https://imagizer.imageshack.com/img540/3134/5EhEhm.jpg
https://imagizer.imageshack.com/img540/4750/8zx0Ie.jpg
https://imagizer.imageshack.com/img673/8049/SjxWZ0.jpg
s-19 2√5
s-21 15
s-22 7
s-23 11