Valid Pair

Chef has three socks in his drawer. Each sock has one of $10$ possible colours, which are represented by integers between $1$ and $10$. Specifically, the colours of the socks are $A$, $B$, and $C$. Chef has to wear two socks which have the same colour. Help Chef find out if that is possible or not. ### Input The first and only line of the input contains three space-separated integers $A$, $B$ an