:%s/\\u{a}/a227/ge | update
:%s/\\u{A}/A195/ge | update
:%s/\\^{a}/â/ge | update
:%s/\\^{A}/Â/ge | update
:%s/\\^{\\i}/î/ge | update
:%s/\\^{I}/Î/ge | update
:%s/\\c{s}/s186/ge | update
:%s/\\c{S}/S170/ge | update
:%s/\\c{t}/t254/ge | update
:%s/\\c{T}/T222/ge | update