iwlist: neighbours channels

iwlist.log

-> # iwlist wlan0 scanning | ruby -ne "readlines.each{|l| puts l if l =~ /(?:Cell|ESSID|Channel)/ }"
          Cell 01 - Address: 00:1A:70:9E:98:60
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"Uncle Zhora"
          Cell 02 - Address: 00:22:6B:86:F6:C8
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"sabaka2"
          Cell 03 - Address: 00:15:E9:62:A7:44
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"MORE"
          Cell 04 - Address: B0:48:7A:A6:8F:3A
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"triolan 227"
          Cell 05 - Address: 00:21:91:EF:5C:04
                    Channel:3
                    Frequency:2.422 GHz (Channel 3)
                    ESSID:"UpLine"
          Cell 06 - Address: F4:EC:38:9D:5A:DA
                    Channel:4
                    Frequency:2.427 GHz (Channel 4)
                    ESSID:"IPNet"
          Cell 07 - Address: 74:EA:3A:C4:14:3C
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"vanya"