class Solution:
    def isRobotBounded(self, ins: str) -> bool:
        dx, dy = [0,1,0,-1], [1,0,-1,0]
        def check(i):
            x, y, j = 0, 0, 0
            for c in  i:
                if c == "G":
                    x, y = x + dx[j], y + dy[j]
                elif c == "L":
                    j = (j + 3)%4
                else:
                    j = (j + 1)%4
            return x == 0 and y == 0
        return check(ins) or check(ins*2) or check(ins*4)

1.