#include <stdio.h>
#include <conio.h>
#include <string.h>
#define size 10
typedef char type_str;
void newnum(type_str str);
void main()
{
	type_str oldnum;
        clrscr();
	printf("Enter your old number (without the '-'): ");
	gets(oldnum);
	printf("\n\nYour new number is: ");
	newnum(oldnum);
	getchar();
}
void newnum(type_str str)
{
	int i;
	if(str=='5')
	{
		if(str=='0' || str=='1' || str=='6')
			printf("050");
		if(str=='2' || str=='3' || str=='8')
			printf("052");
		if(str=='5' || str=='4')
			printf("054");
	}
	if(str=='6')
	{
		if(str=='8')
			printf("050");
		if(str=='4' || str=='5')
			printf("052");
		if(str=='6' || str=='7')
			printf("054");
	}
	printf("-%c",str);
	for(i=3;i<size;i++)
		printf("%c",str);
}