Vasya decided to go to the grocery store. He found in his wallet $a$ coins of $1$ burle and $b$ coins of $2$ burles. He does not yet know the total cost of all goods, so help him find out $s$ ($s > 0$): the minimum positive integer amount of money he cannot pay without change or pay at all using only his coins.

For example, if $a=1$ and $b=1$ (he has one $1$-burle coin and one $2$-burle coin), then:

• he can pay $1$ burle without change, paying with one $1$-burle coin,
• he can pay $2$ burle without change, paying with one $2$-burle coin,
• he can pay $3$ burle without change by paying with one $1$-burle coin and one $2$-burle coin,
• he cannot pay $4$ burle without change (moreover, he cannot pay this amount at all).

So for $a=1$ and $b=1$ the answer is $s=4$.

The first line of the input contains an integer $t$ ($1 \le t \le 10^4$) — the number of test cases in the test.

The description of each test case consists of one line containing two integers $a_i$ and $b_i$ ($0 \le a_i, b_i \le 10^8$) — the number of $1$-burle coins and $2$-burles coins Vasya has respectively.

For each test case, on a separate line print one integer $s$ ($s > 0$): the minimum positive integer amount of money that Vasya cannot pay without change or pay at all.