text: If replacement is required
code: else : NEW_LINE INDENT if ( len ( even ) != 0 ) : NEW_LINE INDENT x = even [ len ( even ) - 1 ] NEW_LINE even . remove ( even [ len ( even ) - 1 ] ) NEW_LINE v [ i ] = x NEW_LINE parity ( even , odd , v , i + 1 ) NEW_LINE DEDENT DEDENT