phrase1 = "Simple String with some UPPercase in Between ends with?"
phrase2 = "BIG STRING ALL CAPS ENDS WITH?"
phrase3_a = "ALLCAPSSTRING NOTHING AT THE END OF STRING"
phrase3_b = "Any String with ALL UPPERCASE (or not) but ends with!"
phrase4 = "tttt"

phrase=re.sub(r'[s]','',phrase)

pattern_phrase1 = re.compile (r'[a-zA-Z0-9]?$')
pattern_phrase2 = re.compile (r'[A-Z0-9]?$')
pattern_phrase3 = re.compile (r'[A-Z]|[.!$]')