Obfuscate "+7(900)500-40-20" by default:
+7(9**)***-**-20
Obfuscate "2200 4400" with "#":
22## ##00
Obfuscate "Moscow" by recipe 'city':
xxxxxx
Obfuscate "+7(900)500-40-20" by recipe 'phone':
****************
Obfuscate "+7(900)500-40-20" by default:
################
Obfuscate "2200 4400" with "x":
xxxxxxxxx