class Solution:
    def numsSameConsecDiff(self, n: int, k: int) -> List[int]:
        def backtrack():
            if len(current) == n:
                if current[0] != 0:
                    result.append(''.join([str(d) for d in current]))
                return
            for i in range(10):
                if current and abs(i - current[-1]) != k:
                    continue
                
                current.append(i)
                backtrack()
                current.pop()
        
        result = []
        current = []
        backtrack()
        return result