# Python | Merging two strings with Suffix and Prefix

• Last Updated : 25 Nov, 2019

Given two strings A and B and these strings contain lower case letters. The task is to tell the length of the merged strings. For example, given A is “abcde” and B is “cdefg”, then merging the two strings results in “abcdefg”. The merge operation is performed in such a manner that the joining characters are both the suffix of A and Prefix of B.
Before merging you are allowed to do any ONE of the following operations:

1. Reverse string A
2. Reverse string B

Examples:

```Input :
A = "ababc"
B = "bcabc"
Output :
Length is 8

the suffix of string A i.e "bc" and prefix of B i.e "bc" is the same
so the merged string will be "ababcabc" and length is 8.

Input :
A = "cdefg"
B = "abhgf"
Output :
Length is 8

the suffix of string A i.e "fg" and prefix of  reversed B i.e "fg" is the same
so the merged string will be "cdefghba" and length is 8

Input :
A = "wxyz"
B = "zyxw"
Output :
Length is 4
```

Below is the Python code implementation of the above mentioned approach.

 `# function to find the length of the``# merged string`` ` `def` `mergedstring(x, y) :``     ` `    ``k ``=` `len``(y)``    ``for` `i ``in` `range``(``len``(x)) :``         ` `        ``if` `x[i:] ``=``=` `y[:k] :``            ``break``        ``else``:``            ``k ``=` `k``-``1`` ` `    ``# uncomment the below statement to``    ``# know what the merged string is``    ``# print(a + b[k:])``    ``return` `len``(a ``+` `b[k:])`` ` `# function to find the minimum length``# among the  merged string``def` `merger(a, b):``    ``# reverse b ``    ``b1 ``=` `b[::``-``1``] `` ` `    ``# function call to find the length``    ``# of string without reversing string 'B'``    ``r1 ``=` `mergedstring(a, b)`` ` `    ``# function call to find the length``    ``# of the string by reversing string 'B'``    ``r2 ``=` `mergedstring(a, b1)`` ` `    ``# compare between lengths``    ``if` `r1 > r2 :``        ``print``(``"Length is"``, r2)``    ``else` `:``        ``print``(``"Length is"``, r1)``             ` `# driver code``a ``=` `"abcbc"``b ``=` `"bcabc"`` ` `merger(a, b)`

Output:

```Length is 8
```

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