def urbanmain() = {
import M5a._
assert(jumpRight("[xxxxxx]xxx", 1, 0) == 8)
assert(jumpRight("[xx[x]x]xxx", 1, 0) == 8)
assert(jumpRight("[xx[x]x]xxx", 1, 0) == 8)
assert(jumpRight("[xx[xxx]xxx", 1, 0) == 11)
assert(jumpRight("[x[][]x]xxx", 1, 0) == 8)
assert(jumpLeft("[xxxxxx]xxx", 6, 0) == 1)
assert(jumpLeft("[xxxxxx]xxx", 7, 0) == -1)
assert(jumpLeft("[x[][]x]xxx", 6, 0) == 1)
}