public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int t = sc . nextInt ( ) ;
  while ( t > 0 ) {
    long a = sc . nextLong ( ) ;
    long b = sc . nextLong ( ) ;
    boolean tt = true ;
    if ( b == a ) {
      System . out . println ( 0 ) ;
      tt = false ;
    }
    if ( b > a ) {
      long temp = a ;
      a = b ;
      b = temp ;
    }
    int c = 0 ;
    while ( a % 8 == 0 && ( a / 8 ) >= b ) {
      a = a / 8 ;
      c ++ ;
      if ( a == b ) {
        System . out . println ( c ) ;
        tt = false ;
        break ;
      }
    }
    if ( tt ) {
      while ( a % 4 == 0 && ( a / 4 ) >= b ) {
        a = a / 4 ;
        c ++ ;
        if ( a == b ) {
          System . out . println ( c ) ;
          tt = false ;
          break ;
        }
      }
    }
    if ( tt ) {
      while ( a % 2 == 0 && ( a / 2 ) >= b ) {
        a = a / 2 ;
        c ++ ;
        if ( a == b ) {
          System . out . println ( c ) ;
          tt = false ;
          break ;
        }
      }
    }
    if ( tt ) System . out . println ( - 1 ) ;
    t -- ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int t = sc . nextInt ( ) ; while ( t > 0 ) { long a = sc . nextLong ( ) ; long b = sc . nextLong ( ) ; boolean tt = true ; if ( b == a ) { System . out . println ( 0 ) ; tt = false ; } if ( b > a ) { long temp = a ; a = b ; b = temp ; } int c = 0 ; while ( a % 8 == 0 && ( a / 8 ) >= b ) { a = a / 8 ; c ++ ; if ( a == b ) { System . out . println ( c ) ; tt = false ; break ; } } if ( tt ) { while ( a % 4 == 0 && ( a / 4 ) >= b ) { a = a / 4 ; c ++ ; if ( a == b ) { System . out . println ( c ) ; tt = false ; break ; } } } if ( tt ) { while ( a % 2 == 0 && ( a / 2 ) >= b ) { a = a / 2 ; c ++ ; if ( a == b ) { System . out . println ( c ) ; tt = false ; break ; } } } if ( tt ) System . out . println ( - 1 ) ; t -- ; } }
(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 (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) (expression_statement (assignment_expression left: (identifier) right: (false))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier)))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (block (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier)))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (block (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier)))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (expression_statement (update_expression (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal)))))) (expression_statement (update_expression (identifier)))))))