If the current character of the second string is not an alphanumeric character , increase the pointer j
while ( j < len2 and ( ( ( str2 [ j ] >= ' a ' and str2 [ j ] <= ' z ' ) or ( str2 [ j ] >= ' A ' and str2 [ j ] <= ' Z ' ) or ( str2 [ j ] >= '0' and str2 [ j ] <= '9' ) ) == False ) ) : NEW_LINE INDENT j += 1 NEW_LINE DEDENT