env1;
Fbbbkxtssrp;
bbbbssseeerrrddddddd;
V V x x x x x T x x x x x V V
V D x x L x L x L x L x x L V
x x . . . . . . . . . . . x x
x x # . # . # . # . # . # x x
x x # 0 # 8 # 4 # 6 # 2 # x x
x T # # # # # # # # # # # T x
x x # 3 # 7 # 5 # 9 # 1 # x x
x x # . # . # . # . # . # x x
x x . . . . . . . . . . . x x
V R x x R x R x R x R x x U V
V V x x x x x T x x x x x V V