char char1,char2;
char1 = char.Parse(Console.ReadLine());
char2 = char.Parse(Console.ReadLine());
if (char1 > char2)
{
    char1++;
    char2--;
    Console.WriteLine(char1 + "+" + char2);
}
else
{
    char1--;
    char2++;
    Console.WriteLine(char1 + "-" + char2);
}