Solve the mystery.
Input:
First line contains a single integer denoting number of test cases(T).
Next T lines have one test case per line.
Each test case is a string of alphabets [a-z].

Output:
Print answer to each test case in an individual line.

Constraints:
1 ≤ T ≤ 100
1 ≤ |S| ≤ 100
a ≤ S[i] ≤ z

Problem Setter : Siddharth Seth

SAMPLE INPUT
5
malayalam
ariyama
alla
brook
kurruk

SAMPLE OUTPUT
121
-1
108
-1
114
import sys
T = int(sys.stdin.readline().rstrip())
for i in range(T):
        tempLst = sys.stdin.readline().rstrip()
        midVal = int(len(tempLst)/2)
        if tempLst == tempLst[::-1]:
        	print ord(tempLst[midVal])
        else:
        	print "-1"