∆∆∆∆∆∆∆....∆∆∆∆...............∆∆∆∆....∆∆.......∆∆
∆∆∆∆∆∆∆...∆∆...∆∆.........∆∆∆∆∆.....∆∆.....∆∆
.......∆∆.........∆∆......∆∆......∆∆................∆∆....∆∆
.......∆∆.......∆∆.........∆∆....∆∆.................∆∆..∆∆
.......∆∆......∆∆∆∆∆∆∆∆...∆...................∆∆∆
∆∆..∆∆....∆∆∆∆∆∆∆∆∆..∆∆................∆∆∆∆
∆∆..∆∆...∆∆................∆∆..∆∆...............∆∆..∆∆
∆∆..∆∆..∆∆..................∆∆...∆∆∆∆∆....∆∆.....∆∆
.∆∆∆∆..∆∆....................∆∆....∆∆∆∆∆..∆∆........∆∆