a=12345678  b=abcd0123  x=12345678abcd0123  c=12345678  d=abcd0123
a=345678  b=cd0123  x=345678cd0123  c=345678  d=cd0123
this is a test of some strings being concatenated.
hello world! hello world! hello world! hello world! hello world! 
abcd abcd abcd abcd abcd abcd abcd abcd abcd abcd 
ABC:ABC:ABC:ABC:
XYZ:XYZ:XYZ:XYZ:
