The first line contains two integers $d_1$ and $m_1$ ($1 \leq d_1 \leq 30$, $1 \leq m_1 \leq 12$) --- the day and month according to the Bytulian calendar.

The second line contains two integers $d_2$ and $m_2$ ($1 \leq d_2 \leq 30$, $1 \leq m_2 \leq 12$) --- the day and month according to the Bitulian calendar.

It is guaranteed that the date according to the Bytulian calendar is not later than the date according to the Bitulian calendar.