5x5 Crypto

Python script:

grid5x5 = [
    ['a','b','c','d','e'],
    ['f','g','h','i','j'],
    ['l','m','n','o','p'],
    ['q','r','s','t','u'],
    ['v','w','x','y','z']
]

text="1-3,4-4,2-1,{,4-4,2-3,4-5,3-2,1-2,4-3,_,4-5,3-5,}"
text = text.split(',')
for t in text:
    if '-' in t:
        x,y = t.split('-')
        print(grid5x5[int(x)-1][int(y)-1],end='')
    else:
        print(t,end='')