#include <fstream>
#define N 105

using namespace std;
ifstream fin("detdrum.in");
ofstream fout("detdrum.out");

int a[N][N],n;
int viz[N];
int Q[N];
int prim,ultim;
int x;
int rad;
int V[N],m;

void Citire()
{ int i,y;
  fin>>n>>x;
  for(i=1;i<=n;i++)
    { fin>>y;
      if(y==0) rad=i;
      a[y][0]++;
      a[y][a[y][0]]=i;
    }
}

void BFS(int rad)
{ int v,i,y;
  Q[1]=rad; prim=ultim=1;
  viz[rad]=1;
  m++;
  V[m]=rad;
  while(prim<=ultim && y!=x)
     { v=Q[prim]; prim++;
       for(i=1;i<=a[v][0];i++)
         { y=a[v][i];
           if(viz[y]==0)
             { viz[y]=1;
               ultim++; Q[ultim]=y;
               m++;
               V[m]=y;
               if(y==x) return;
             }
         }
     }
}


int main()
{ int i;
  Citire();
  BFS(rad);
  for(i=m;i>=1;i--)
    fout<<V[i]<<" ";
    return 0;
}