document.write( "Question 1210231: Find the number of ways filling in a 4 \times 4 grid, such that \n" );
document.write( "* Each cell contains a 0 or a 1. \n" );
document.write( "* The sum of the numbers in each row and each column is at least 2.\r \n" );
document.write( "\n" );
document.write( "An example is shown below.\r \n" );
document.write( " \n" );
document.write( "\n" );
document.write( "0110\r \n" );
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document.write( "1010\r \n" );
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document.write( "0011\r \n" );
document.write( "\n" );
document.write( "1111 \n" );
document.write( "
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