How do you get the string position of the closing bracket that belongs to the first bracket? The beginning of the string is always a {.

Sample input:
 1. latex = "{123{4}{5}{6}789}101112"
 2. latex2 = "{1{2}{3}}”
 3. latex3 = “{1{2}{3}}{4}{5}

Sample output: 
 1. getcBracketPosition(latex)  // return 16
 2. getcBracketPosition(latex2) // return 7
 3. getcBracketPosition(latex3) // return 7

How do I write the function, getcBracketPosition(latex)?