def topsort():
 
    def dfs(node):
 
        explored[ node ] = True
 
        for k in range( 1, nodes + 1):
 
            if explored[ k ] is False and matrix[ node ][ k ] == 1:
 
                dfs( k )
 
        sol.append(node)
 
    def reverse2(list):
 
            i = 0
 
            j = len(list)-1
 
            while i < j:
 
                list[i],list[j] = list[j], list[i]
 
                i +=1
 
                j -=1
 
    def reverse(list):
            newList = list[::-1]
            return newList
 
 
    #file = open("topsort.in", "r")
 
    #grab the number of the nodes and edges
    list = [int(i) for i in input().split(" ")]
    nodes = list[0];
    edges = list[1];
 
    #define the matrix
    matrix = [[0 for column in range(nodes+1)] for row in range(nodes+1)]
    explored = [False] * (nodes+1)
    sol = []
    for i in range(0, edges):
       line = input().split(" ")
       x = int(line[0])
       y = int(line[1])
       matrix[x][y] = 1
       edges-=1
 
    for i in range(1, nodes+1):
 
        if(explored[i] is False):
 
           dfs( i )
 
    sol = reverse( sol )
 
    print( sol )
 
topsort()

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