a=,four,fif,six,seven,eight,nine} b={one,two,three${a/f,/ve,} c=thir${a/t}t eval "printf '%s ' zero {$b,ten,eleven,twelve,{$c\een,{twen,${c/u}y{,\ $b}} one\ hundred"
Note that non-ascii characters in the above source code will be escaped (such as \x9f).