public static void main ( String [ ] args ) {
  MyScanner sc = new MyScanner ( ) ;
  String s = sc . next ( ) ;
  int l = s . length ( ) ;
  int st = l - 1 ;
  int en = 0 ;
  for ( int i = 0 ;
  i < l ;
  i ++ ) {
    if ( s . charAt ( i ) == 'A' ) {
      st = Math . min ( i , st ) ;
    }
    if ( s . charAt ( i ) == 'Z' ) {
      en = Math . max ( i , en ) ;
    }
  }
  System . out . println ( en - st + 1 ) ;
}

public static void main ( String [ ] args ) { MyScanner sc = new MyScanner ( ) ; String s = sc . next ( ) ; int l = s . length ( ) ; int st = l - 1 ; int en = 0 ; for ( int i = 0 ; i < l ; i ++ ) { if ( s . charAt ( i ) == ' A ' ) { st = Math . min ( i , st ) ; } if ( s . charAt ( i ) == ' Z ' ) { en = Math . max ( i , en ) ; } } System . out . println ( en - st + 1 ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (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: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)))))))