たとたん(に) => as soon as; just as ~ N3
いったん~ば/と/たら   => Once you do something N2
Necessity, obligation
ほとんど…た => hardly any, almost all N2
Description
たとたん => As soon as A (occured), B N3
Time, Situation
たぶん => Maybe... N4
Speculation
そのとたん => as soon as; just as ~ N2
Time
~んがため(に)/~んがための      => in order to ~ N1
~たらんとする      => want to become, worthy of ~ N1
たぶん => perhaps; probably N4
なんと => How N3
Doubt
んだった => If... (express regret) N2
Regret
...たいんですが => want N4
How to say the beginning