possibilities in string
===========================
 str1=" PO BOx 1234, Hyde"
 str2=" PO BOx 1234, Hyd"
 str3=" PO BOx 1234, Hbad"
 str4=" PO BOx 1234, Hbd"

possiblities in list=[Hyde,Hyd  Hyderab,Hyderabad,Hbad,Hbd]

we need to extract city from the string and check the city in list. if matches it shoild convert into hyderabad

Ex: extracted city part is "Hbd" if that varible matches in List [Hyde,Hyd  Hyderab,Hyderabad,Hbad,Hbd]

it should convertsinto Hyderabad
new string is str=" PO BOx 1234, Hyderabad"