public static void main ( String [ ] args ) {
  char [ ] S = sc . next ( ) . toCharArray ( ) ;
  char [ ] T = sc . next ( ) . toCharArray ( ) ;
  int [ ] start = new int [ 26 ] ;
  int [ ] end = new int [ 26 ] ;
  Arrays . fill ( start , - 1 ) ;
  Arrays . fill ( end , - 1 ) ;
  for ( int i = 0 ;
  i < S . length ;
  i ++ ) {
    int a = S [ i ] - 'a' ;
    int b = T [ i ] - 'a' ;
    if ( ( start [ a ] != - 1 && end [ b ] != a ) || ( end [ b ] != - 1 && start [ a ] != b ) ) {
      System . out . println ( "No" ) ;
      return ;
    }
    start [ a ] = b ;
    end [ b ] = a ;
  }
  System . out . println ( "Yes" ) ;
}

public static void main ( String [ ] args ) { char [ ] S = sc . next ( ) . toCharArray ( ) ; char [ ] T = sc . next ( ) . toCharArray ( ) ; int [ ] start = new int [ 26 ] ; int [ ] end = new int [ 26 ] ; Arrays . fill ( start , - 1 ) ; Arrays . fill ( end , - 1 ) ; for ( int i = 0 ; i < S . length ; i ++ ) { int a = S [ i ] - ' a ' ; int b = T [ i ] - ' a ' ; if ( ( start [ a ] != - 1 && end [ b ] != a ) || ( end [ b ] != - 1 && start [ a ] != b ) ) { System . out . println ( " No " ) ; return ; } start [ a ] = b ; end [ b ] = a ; } System . out . println ( " Yes " ) ; }
(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: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (decimal_integer_literal))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (decimal_integer_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (unary_expression operand: (decimal_integer_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (unary_expression operand: (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: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (character_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (character_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (unary_expression operand: (decimal_integer_literal))) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (unary_expression operand: (decimal_integer_literal))) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier)))))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))