static int countOfLetters ( String str ) {
  int letter = 0 ;
  for ( int i = 0 ;
  i < str . length ( ) ;
  i ++ ) {
    if ( ( str . charAt ( i ) >= 'A' && str . charAt ( i ) <= 'Z' ) || ( str . charAt ( i ) >= 'a' && str . charAt ( i ) <= 'z' ) ) letter ++ ;
  }
  return letter ;
}

static int countOfLetters ( String str ) { int letter = 0 ; for ( int i = 0 ; i < str . length ( ) ; i ++ ) { if ( ( str . charAt ( i ) >= ' A ' && str . charAt ( i ) <= ' Z ' ) || ( str . charAt ( i ) >= ' a ' && str . charAt ( i ) <= ' z ' ) ) letter ++ ; } return letter ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))))) consequence: (expression_statement (update_expression (identifier)))))) (return_statement (identifier))))