java - Better way to write if statement with a lot of || -

i wonder if there more elegant way write if statement lot of || in java. i've given different values alphabet letters:

a,o,i,b,t,s,m,n -> 1  c,d,f,g         -> 5  w,y,z,h,q       -> 10 

so, want check given letter , if equal 1 of 2nd group example 5. right i'm checking this:

string value; if (getletter().equals("Α")|| getletter().equals("o") ||     getletter().equals("i") || getletter().equals("b") ||     getletter().equals("t") || getletter().equals("s") ||     getletter().equals("n") || getletter().equals("n")) value = "1"; 

is there better way it?

string letter = getletter(); if ("aoibtsmn".contains(letter))      value = "1";  else if ("cdfg".contains(letter))     value = "5"; else if ("wyzhq".contains(letter))     value = "10"; 

not optimal, short, clear , self-explaining.