CF547A.Mike and Frog

Mike has a frog and a flower. His frog is named Xaniar and his flower is named Abol. Initially(at time $0$ ), height of Xaniar is $h_{1}$ and height of Abol is $h_{2}$ . Each second, Mike waters Abol and Xaniar.

So, if height of Xaniar is $h_{1}$ and height of Abol is $h_{2}$ , after one second height of Xaniar will become and height of Abol will become where $x_{1},y_{1},x_{2}$ and $y_{2}$ are some integer numbers and denotes the remainder of $a$ modulo $b$ .

Mike is a competitive programmer fan. He wants to know the minimum time it takes until height of Xania is $a_{1}$ and height of Abol is $a_{2}$ .

Mike has asked you for your help. Calculate the minimum time or say it will never happen.

The first line of input contains integer $m$ ( $2<=m<=10^{6}$ ).

The second line of input contains integers $h_{1}$ and $a_{1}$ ( 0<=h_{1},a_{1}<m ).

The third line of input contains integers $x_{1}$ and $y_{1}$ ( 0<=x_{1},y_{1}<m ).

The fourth line of input contains integers $h_{2}$ and $a_{2}$ ( 0<=h_{2},a_{2}<m ).

The fifth line of input contains integers $x_{2}$ and $y_{2}$ ( 0<=x_{2},y_{2}<m ).

It is guaranteed that $h_{1}≠a_{1}$ and $h_{2}≠a_{2}$ .

Print the minimum number of seconds until Xaniar reaches height $a_{1}$ and Abol reaches height $a_{2}$ or print -1 otherwise.

In the first sample, heights sequences are following:

Xaniar:

Abol: