Question 629158

Think of this string:

      A1B2C3D4E5F6G

We must choose a left bracket "{" to go where the A is.  That's 1 way.

We may either choose "} {" or a comma "," to go where the B is.  That's 2 ways.

We may either choose "} {" or a comma "," to go where the C is.  That's 2 ways.

We may either choose "} {" or a comma "," to go where the D is.  That's 2 ways.

We may either choose "} {" or a comma "," to go where the E is.  That's 2 ways.

We may either choose "} {" or a comma "," to go where the F is.  That's 2 ways.

We must choose a right bracket "}" to go where the G is.  That's 1 way.

Answer: 1󫎾󫎾󫎽 = 32 ways.

Edwin</pre>