Please subscribe to the official Codeforces channel in Telegram via the link: https://t.me/codeforces_official.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ACM-ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

H. Self-exploration

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputBeing bored of exploring the Moon over and over again Wall-B decided to explore something he is made of — binary numbers. He took a binary number and decided to count how many times different substrings of length two appeared. He stored those values in $$$c_{00}$$$, $$$c_{01}$$$, $$$c_{10}$$$ and $$$c_{11}$$$, representing how many times substrings 00, 01, 10 and 11 appear in the number respectively. For example:

$$$10111100 \rightarrow c_{00} = 1, \ c_{01} = 1,\ c_{10} = 2,\ c_{11} = 3$$$

$$$10000 \rightarrow c_{00} = 3,\ c_{01} = 0,\ c_{10} = 1,\ c_{11} = 0$$$

$$$10101001 \rightarrow c_{00} = 1,\ c_{01} = 3,\ c_{10} = 3,\ c_{11} = 0$$$

$$$1 \rightarrow c_{00} = 0,\ c_{01} = 0,\ c_{10} = 0,\ c_{11} = 0$$$

Wall-B noticed that there can be multiple binary numbers satisfying the same $$$c_{00}$$$, $$$c_{01}$$$, $$$c_{10}$$$ and $$$c_{11}$$$ constraints. Because of that he wanted to count how many binary numbers satisfy the constraints $$$c_{xy}$$$ given the interval $$$[A, B]$$$. Unfortunately, his processing power wasn't strong enough to handle large intervals he was curious about. Can you help him? Since this number can be large print it modulo $$$10^9 + 7$$$.

Input

First two lines contain two positive binary numbers $$$A$$$ and $$$B$$$ ($$$1 \leq A \leq B < 2^{100\,000}$$$), representing the start and the end of the interval respectively. Binary numbers $$$A$$$ and $$$B$$$ have no leading zeroes.

Next four lines contain decimal numbers $$$c_{00}$$$, $$$c_{01}$$$, $$$c_{10}$$$ and $$$c_{11}$$$ ($$$0 \leq c_{00}, c_{01}, c_{10}, c_{11} \leq 100\,000$$$) representing the count of two-digit substrings 00, 01, 10 and 11 respectively.

Output

Output one integer number representing how many binary numbers in the interval $$$[A, B]$$$ satisfy the constraints mod $$$10^9 + 7$$$.

Examples

Input

10

1001

0

0

1

1

Output

1

Input

10

10001

1

2

3

4

Output

0

Note

Example 1: The binary numbers in the interval $$$[10,1001]$$$ are $$$10,11,100,101,110,111,1000,1001$$$. Only number 110 satisfies the constraints: $$$c_{00} = 0, c_{01} = 0, c_{10} = 1, c_{11} = 1$$$.

Example 2: No number in the interval satisfies the constraints

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Dec/14/2018 00:38:43 (d1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|