public static void main ( String [ ] args ) {
  String a = sc . next ( ) , b = sc . next ( ) ;
  StringBuilder sb = new StringBuilder ( ) ;
  for ( int i = 0 ;
  i < a . length ( ) ;
  i ++ ) {
    sb . append ( a . charAt ( i ) ) ;
    if ( b . length ( ) > i ) {
      sb . append ( b . charAt ( i ) ) ;
    }
  }
  System . out . println ( sb ) ;
}

public static void main ( String [ ] args ) { String a = sc . next ( ) , b = sc . next ( ) ; StringBuilder sb = new StringBuilder ( ) ; for ( int i = 0 ; i < a . length ( ) ; i ++ ) { sb . append ( a . charAt ( i ) ) ; if ( b . length ( ) > i ) { sb . append ( b . charAt ( i ) ) ; } } System . out . println ( sb ) ; }
(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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (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 (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))