$~ = '731161141153164109110115103100113317910011310731719698106100113'; while( ${~} ) { $==cos(453 )/cos(1533)+sin(0.77)/sin(652.173913*0.552+0.77); ${~}=~m(^(\d{${=}})) && ($/ = chr($=)); ${4-2-(2-1)}=~m[^1] && $=++; $~=~s;^(\d{${=}});;;${"\\"}=chr($1+1); print ''; }