#include <stdio.h>

typedef struct NODE *pNODE;
struct NODE {
	char nodeLabel;
	pNODE leftmostChild, rightSibling;
};

void postorder(pNODE n)
{
	pNODE c; /* a child of node n */

	c = n->leftmostChild;
	while (c != NULL) {
		postorder(c);
		c = c->rightSibling;
	}
	printf("\%c\n", n->nodeLabel);
}