// make sure next character is not an identifier
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') || c === '_' || c === '-' || c === '/' || c === '?' || c === '!') {
str += c;
i += 1;
// make sure next character is not an identifier
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') || c === '_' || c === '-' || c === '/' || c === '?' || c === '!') {
str += c;
i += 1;