public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  int n = in . nextInt ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    long k = in . nextInt ( ) ;
    long c = in . nextInt ( ) ;
    int s = in . nextInt ( ) ;
    System . out . print ( "Case #" + ( i + 1 ) + ": " ) ;
    if ( c * s < k ) {
      System . out . println ( "IMPOSSIBLE" ) ;
    }
    else {
      long val = 0 ;
      while ( s > 0 ) {
        long exp = 1 ;
        long total = 0 ;
        while ( exp < Math . pow ( k , c ) ) {
          total += val * exp ;
          exp *= k ;
          if ( val < k - 1 ) {
            val ++ ;
          }
        }
        s -- ;
        System . out . print ( total + 1 ) ;
        if ( total + 1 == Math . pow ( k , c ) ) {
          s = 0 ;
        }
        if ( s != 0 ) {
          System . out . print ( " " ) ;
        }
        else {
          System . out . println ( ) ;
        }
      }
    }
  }
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; int n = in . nextInt ( ) ; for ( int i = 0 ; i < n ; i ++ ) { long k = in . nextInt ( ) ; long c = in . nextInt ( ) ; int s = in . nextInt ( ) ; System . out . print ( " Case ▁ # " + ( i + 1 ) + " : ▁ " ) ; if ( c * s < k ) { System . out . println ( " IMPOSSIBLE " ) ; } else { long val = 0 ; while ( s > 0 ) { long exp = 1 ; long total = 0 ; while ( exp < Math . pow ( k , c ) ) { total += val * exp ; exp *= k ; if ( val < k - 1 ) { val ++ ; } } s -- ; System . out . print ( total + 1 ) ; if ( total + 1 == Math . pow ( k , c ) ) { s = 0 ; } if ( s != 0 ) { System . out . print ( " ▁ " ) ; } else { System . out . println ( ) ; } } } } }
(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)))) (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 (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (string_literal) right: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (string_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (update_expression (identifier))))))) (expression_statement (update_expression (identifier))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) alternative: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list)))))))))))))